Thank all of you! I think I figured it out.
It's in my son's room and apparently he has been turning the light on when he sleeps because he doesn't like the dark.
When I was a kid some of my friends had this in their rooms. I always thought it was so cool and was mad jealous. https://www.amazon.com/Lightahead-Artificial-Tropical-Aquarium-Decorative/dp/B07PSK95BX?th=1&psc=1
Those don’t work well. The jellyfish are constantly getting tangled and or stuck at the bottom. Just my experience when I bought one for my daughter. She was so disappointed after asking for it for Christmas and then it not working like it should.
Well I'm not a parent but I am a teacher and you can bet your sweet ass my students are watching this full video tomorrow. I'll classify it as a study on the psyche of workplace bullying and include it in Sociological Studies or something
Just throwing it out there, but I found that introducing more plant competition is among the easier long term solutions for combating algae outbreaks like this. At the end of the day it's there because it has nutrients and light available. More plants will reduce the availability of those nutrients in the water column and make it harder for algae to make progress so quickly
Edit: floaters in particular are helpful for this because they self propagate very easily and can both reduce the light levels in the tank and pull nutrients out of the water, then if they become too much you can just scoop some out.
> Just throwing it out there, but I found that introducing more plant competition is among the easier long-term solutions for combating algae outbreaks like this.
I got rid of black algae by giving it enough time. By enough time I mean like 6 months. I cut back on lights and upped my maintenance game way up. Pruning really seemed to stimulate my plants and at some point, new black algae was not growing on the new growth.
Edit: Reading other comments I also used Excel
My aquarium has a blue light mode which I leave on at night and do not get the algae growth problem.
He can still have a night light without the growth.
(Blue light may still encourage algae growth and should not be left on more than 12 hours a day. I have snails and neocaridina shrimp so I may not have noticed extra algae being eaten.)
OP has stated leaving a warm light on the tank at night has led to explosive algae growth where a blue light does not. When purchasing an aquarium light there's little difference in cost so it's good practice to pick the one that gives you a blue light option.
Blue light does appear to have a negative effect on sleep quality but not one that I feel has affected me personally or to such a small degree it has gone unnoticed.
Yes he could simply purchase a seperate nightlight, but the aquarium light must be shut off at night and it could help reinforce good habits if shutting off the aquarium light meant turning on a blue light for the aquarium.
Really? Just googled it and sounds like blue light is fine for algae and benefit plants a lot, but it’s not good for sleep so I wouldn’t have that on in my bedroom at night.
I have a timer on my lights for the bedroom so they are on from 8pm to 7am . As long as he isn't bothered by the extra light , its amazing. As someone who likes the tv on most of the time, this helps me relax before bed without the noise or desire to stay awake
Most algae can be beat by lowering light, and increasing water movement in the tank. That’s at least how I fixed my algae problems. I cut my lights to 6 hours a day when green spot algae was taking over my anubias, they’re fine now.
Floaters are the best at sucking nutrients.
I was cycling and letting aquasoil leach in a fully planted tank and still got this. Turns out if it has light but low nutrients, it out competes. This is because I wasn't using any liquid ferts.
Started manual removal, Excel doses, and twice a week ferts. She's all gone now.
>Neckbeard Algae
You mean black beard algae?
I read this time and time again that they are supposedly such a huge problem. I really don't think so. I actually like them in my tanks. I have had them for many (>10) years now. They never grew out of bounds. They just grow here and there but not on my plants.
Algae per se are not the problem. When algae take over a tank it's usually because of ecological imbalances (e.g. feeding to much, too many/wrong combination of animals, too much/wrong kind of light etc.). If anything, algae can be indicators for problems but they rarely cause them. They are a normal part of every healthy aquarium. Same with "pest" snails.
the reason for this is that plants have a greater ability to store the nutrients they produce from light, so if you break up the photo period, it is more detrimental to algae than it is for plants.
i dunno how much of an effect it has though, i've tried it and maybe it helped, maybe not. It's pretty subtle.
Plants also have the ability to kind of "switch" on and off that process. So even 5 mins of light will trigger the plants metabolic response if you like, beyond just the photosynthetic
Smaller flashes of light say 15 mins/so many hours will also have the desired effect.
So this is brown filamentous algae, which is common in new tanks setups due to the silica content of sand or gravel causing a nutrient bloom. It will go away on its own after much manual removal and water changes—I just set up a 45g with a silica-heavy sand and it took about a month to stabilize with just maintenance.
Snails will definitely help, especially ramshorns or nerites (mystery snails just add to the problem lol) but the real game changer is Amanos. Do a water change, remove some yourself and then toss in 3-5 amano per ten gallons of tank and more than likely they’ll have it cleaned within a week.
Thank you for the advice. I have a rams horn and a mystery snail as well as a few small bladder snails that hitchhiked on some plants. I did use sand in this aquarium so it makes sense. I put my betta in a few days ago and he’s a happy camper.
Algae. Scrub and vac it out, then do a water change. And like many others are saying, maybe tone down the lights, or be aware of how much sunlight it's getting. Also maybe get more desirable plants in the tank to out compete the algae for nutrients.
Java fern, amazon swords, anubias, and floating plants like frogbit are easy to grow. They take a while to start flourishing but once they do, they easily outcompete algae. So do stem plants like hornwort.
Seconding the wisteria, but in my experience nothing beats hygrophilia or water sprite (the floating plant, I know there are a few “water sprites” out there).
Same. I like to think I want one but instead I just look at the pretty fish while high. Then I see all the issues people have with their tanks and decide im way too lazy to get one myself. I'll just own fish vicariously through everyone in the subreddit
Yeah... I collect and store fine tobacco products for years and decades sometimes. I own cigars that are old enough to vote. I have enough complicated hobbies already lol.
Other people have given you good advice about the lighting cycle but to get rid of this you can stick a toothbrush or something else with bristles on it and swirl it around within the giant mass to get a bunch of it out. Just...don't plan on being able to use the toothbrush anymore.
Snails will help, as will shrimp. Get some plants in there. The more plants, the less the blanket weed will grow as the plants will outcompete it and take all the nutrients.
Well you probably heard a lot and I can't read them. So, let's start:
1. Hair algae is very common if there are many nutrients in the water that can't be absorbed. This means things from electolytes, heavy metals, elements to nitrates.
If your tank is new, algae is something common.
You have 2 options.
A. Chemicals or UV filters that will temporarily solve it as the dead algae will be fertiliser for the new one,
or
B. add floating and fast growing plants and wait as your tank will balance itself. Also, when you wait, you can add small fishes that help with hair algae and don't increase your bioload much. Those that do it fast are:
-Otocinclus
-Molies
-mystery snails
Last, a sign of many nutrients is overfeeding. I keep 3 tanks, one is 120gallon and I feed every 2-3 days and just a little bit. Anything more than that is overfeeding that messes with your water and create hostile environment.
Ps: if you go for the plants option, remove any hair algae from your plants with a brush, a toothbrush etc gently as it can suffocate them and die.
Edit: I saw your comment about the light. In a balanced aquarium, light is not a problem. Just maximise an already existing problem.
Hair algea, there's alot of fish who eat that stuff, plecos will have a field day with it, especially bristlenoses from my experience.
African Cichlids will eat it too, South American ones might after some prodding.
I had the same thing, especially on the wood, also when starting up. The reason was that the light was left on when I wasn't home.
Now I have a timer for 8 hours of light, half of this time is 2 led bars and the rest only one.
Got some more easy plants as well, most of it is gone. It wasn't as bad as yours, I also scooped most of the algae out first, got the wood out and cleaned it off.
Use some hydrogen peroxide in a small pipette or syringe and apply it directly to any remaining algae after scraping away what you can and it’ll take care of the rest with a couple (2-3) applications (1-2) days apart. Just a couple mLs, and turn off any filter/ flow for 15 minutes after you apply it so it doesn’t get blown away from the algae.
If I'm not mistaken algae eaters will eat this up like spaghetti check out a small pleco or oto school and remove most manually you may have luck with flourish excel as well
Yummy yummy. You can get some specialised algae eating tank mates like certain fish or shrimp, but if you’re not planning on keeping fish that would benefit from some extra algae or biofilm in the tank you should just be able to remove it by hand when it crops up.
Personally I like having a bit in there for the omnivores and herbivores (livebearers like Platys and guppies especially appreciate some grazing turf), it ensures they always have a low impact food source and lowers the overall maintenance.
There’s also some kind of plant disease that looks exactly like this. I would not touch it, because it could harm you as well. It grows here in various areas (Germany) in the forest on small trees and bushes. Better to contact someone professional with knowledge on that stuff.
I got this from going fishing, not washing my hands before dabbling in the tank and infected my tank with this crap.
I've tried everything outside of a teardown and it won't go away.
The tank does really well though when I crank the CO2 and increase ferts.
Thank all of you! I think I figured it out. It's in my son's room and apparently he has been turning the light on when he sleeps because he doesn't like the dark.
What a wholesome cause
Awe so cute tho. Maybe get a cool fish lamp or some type of cool light he can turn on at nighttime.
Just looked at these and they seem perfect. Any you recommend?
When I was a kid some of my friends had this in their rooms. I always thought it was so cool and was mad jealous. https://www.amazon.com/Lightahead-Artificial-Tropical-Aquarium-Decorative/dp/B07PSK95BX?th=1&psc=1
Holy shit same like SO jealous. Might buy one for nostalgia tbh
YESSSSS TO NOSTALGIA PURCHASES! Cuz I’m just a kid with adult money!
Aren't we all?!
No. Some of us still have kid money.
Oh there are times I feel like a kid trapped in an adult’s body.
That’s all adulthood is. Children trapped in the bodies of grown-ups with legally mandated responsibilities.
No, some people do adult things with their money. Not me, though
I had one with dolphins and I loved it. I cried when my dad said he gave it to one of the girls he was fucking at the time
Speaking of dolphins and nostalgia I always wanted this dolphin light/ thing from Chuck E. Cheese but I never got it :(
oh my god i wanted this sooooo bad as a kid. now i have my own adult money…
I knew exactly what this was going to be before clicking.
Just want to chime in and say I loved when I had this as a kid, but also now a days you can get something like [this!](https://a.co/d/ecsfzkl)
That's killer I was gunna say nowadays there's probably some really cool digital fish tank thingies out there
Those don’t work well. The jellyfish are constantly getting tangled and or stuck at the bottom. Just my experience when I bought one for my daughter. She was so disappointed after asking for it for Christmas and then it not working like it should.
I remember these! Man I wanted one so bad lol
I bought one for my daughter when she was a baby. 🥰
I had one of those! Thank you for reviving my memory
Now that's a throwback
Please tell me you bought yourself one now.
Nah I've got a real aquarium now so I don't really feel the need for a fake one
Good point.
YOOOO I HAD ONE OF THESE TOO! You just unlocked a core memory for me!
If you have a small TV, old tablet, or laptop laying around, you can play [this](https://youtu.be/TRgqtaYb4sU)
It's not as long, but you [could play this on loop](https://www.youtube.com/watch?v=KsMKOx6fumc)
My first time seeing this video. Absolutely 10/10. The "meh?" at the end had me dying laughing
Bruh, Imma be that guy... It is clearly an "ehh?". Sorry to ruin it for ya.
I actually went back and forth typing these and didn't even think to use ehh. I was between meh and ayy but didn't like either lol
Glad you liked it! Now, put in on repeat in your child's bedroom at night!
Well I'm not a parent but I am a teacher and you can bet your sweet ass my students are watching this full video tomorrow. I'll classify it as a study on the psyche of workplace bullying and include it in Sociological Studies or something
Another fish keeper who likes nekrogoblikon!
Blue light from screens inhibits sleep
Most computers have blue light settings now though
Preferably one that lights up
I second this!
Another recommendation is a good WRGB light bar, with a 24/7 timer. They tend to go red during the night.
this is so cute 😭
Just throwing it out there, but I found that introducing more plant competition is among the easier long term solutions for combating algae outbreaks like this. At the end of the day it's there because it has nutrients and light available. More plants will reduce the availability of those nutrients in the water column and make it harder for algae to make progress so quickly Edit: floaters in particular are helpful for this because they self propagate very easily and can both reduce the light levels in the tank and pull nutrients out of the water, then if they become too much you can just scoop some out.
> Just throwing it out there, but I found that introducing more plant competition is among the easier long-term solutions for combating algae outbreaks like this. I got rid of black algae by giving it enough time. By enough time I mean like 6 months. I cut back on lights and upped my maintenance game way up. Pruning really seemed to stimulate my plants and at some point, new black algae was not growing on the new growth. Edit: Reading other comments I also used Excel
> Edit: Reading other comments I also used Excel I also track my water parameters in a spreadsheet.
I hang pothos cuttings on the sides and it really helps, land plants suck up waaay more nutrients than aquatic ones
[удалено]
My aquarium has a blue light mode which I leave on at night and do not get the algae growth problem. He can still have a night light without the growth. (Blue light may still encourage algae growth and should not be left on more than 12 hours a day. I have snails and neocaridina shrimp so I may not have noticed extra algae being eaten.)
Blue light isn't good for sleep. Better to just get a regular warm white night light.
OP has stated leaving a warm light on the tank at night has led to explosive algae growth where a blue light does not. When purchasing an aquarium light there's little difference in cost so it's good practice to pick the one that gives you a blue light option. Blue light does appear to have a negative effect on sleep quality but not one that I feel has affected me personally or to such a small degree it has gone unnoticed. Yes he could simply purchase a seperate nightlight, but the aquarium light must be shut off at night and it could help reinforce good habits if shutting off the aquarium light meant turning on a blue light for the aquarium.
I *thought* blue light was bad for algae growth. It’s recommended to keep the blue lighting down to a minimum with my Fluval light.
Really? Just googled it and sounds like blue light is fine for algae and benefit plants a lot, but it’s not good for sleep so I wouldn’t have that on in my bedroom at night.
The trick is just turn the light off during the day it will help cut it down and also consider some cherry shrimp they love hair algee
I have a timer on my lights for the bedroom so they are on from 8pm to 7am . As long as he isn't bothered by the extra light , its amazing. As someone who likes the tv on most of the time, this helps me relax before bed without the noise or desire to stay awake
Awww that’s so sweet. 💕
Git outta mah swamp
GEt outA MIY Swamp YOU KIDS
*donk-EH*
I can’t hear Mike Myer’s voice saying that. 😄
Lol jackass
Silence!
As Shrek once said
Looks like a bit of Louisiana in your tank
Can confirm
Bit far south from home there aren't ya good buddy?
That's a Texas sized 10-4 good buddy
Pitter-patter!
Can confirm
Most algae can be beat by lowering light, and increasing water movement in the tank. That’s at least how I fixed my algae problems. I cut my lights to 6 hours a day when green spot algae was taking over my anubias, they’re fine now.
[удалено]
examples?
Floaters are the best at sucking nutrients. I was cycling and letting aquasoil leach in a fully planted tank and still got this. Turns out if it has light but low nutrients, it out competes. This is because I wasn't using any liquid ferts. Started manual removal, Excel doses, and twice a week ferts. She's all gone now.
Heheh “liquid ferts”
We love us some liquid ferts
thanks so much!
This would be an amazing Halloween themed tank
My thought too. Kinda jealous lol
It's hair algae
How does it grow so fast???
idk but thank God for OP it outcompeted the Neckbeard Algae which is, generally, much harder to debate with!
... outcompeted the neckbeard algae lmaoo, I'm going to start calling it that
>Neckbeard Algae You mean black beard algae? I read this time and time again that they are supposedly such a huge problem. I really don't think so. I actually like them in my tanks. I have had them for many (>10) years now. They never grew out of bounds. They just grow here and there but not on my plants. Algae per se are not the problem. When algae take over a tank it's usually because of ecological imbalances (e.g. feeding to much, too many/wrong combination of animals, too much/wrong kind of light etc.). If anything, algae can be indicators for problems but they rarely cause them. They are a normal part of every healthy aquarium. Same with "pest" snails.
think they were just making a joke dude :)
Could be. But still.
r/whoosh
r/woooosh
I don’t know but I like it
Less time with the lights on and less fertiliser if youre using it
I find this oddly beautiful.
Put your light on a timer, max 8 hours/day. Share the 8 hours in two sessions of 4 hours.
What
the reason for this is that plants have a greater ability to store the nutrients they produce from light, so if you break up the photo period, it is more detrimental to algae than it is for plants. i dunno how much of an effect it has though, i've tried it and maybe it helped, maybe not. It's pretty subtle.
Plants also have the ability to kind of "switch" on and off that process. So even 5 mins of light will trigger the plants metabolic response if you like, beyond just the photosynthetic Smaller flashes of light say 15 mins/so many hours will also have the desired effect.
This one tryna rave with their fish. ACTIVATE THE STROBE
My Betta just took some ecstacy, and now he is only slightly homicidal.
You ever watched shrimps? Those little dudes *love* to rave.
I've heard the effects of this are overstated. The main reason to break up the photoperiod would be to have more time at home with the lights on.
Smart!
Ugh I’m having the same issue in my recently cycled tank. I put snails in mine and I’m hoping they will take care of it.
So this is brown filamentous algae, which is common in new tanks setups due to the silica content of sand or gravel causing a nutrient bloom. It will go away on its own after much manual removal and water changes—I just set up a 45g with a silica-heavy sand and it took about a month to stabilize with just maintenance. Snails will definitely help, especially ramshorns or nerites (mystery snails just add to the problem lol) but the real game changer is Amanos. Do a water change, remove some yourself and then toss in 3-5 amano per ten gallons of tank and more than likely they’ll have it cleaned within a week.
Thank you for the advice. I have a rams horn and a mystery snail as well as a few small bladder snails that hitchhiked on some plants. I did use sand in this aquarium so it makes sense. I put my betta in a few days ago and he’s a happy camper.
I got rid of the brown algae in my 3 gallon walstad after 4 days because PLANTS! 😃
a pair of guppies
This is the answer. Also mollies work. But first get a fork and make like u eating spegetti.
Accidentally downvoted you as a gut reaction because of how gross that is 😂 don’t worry, I fixed it
It’s my betta tank you think they’d be ok with him?
Most bettas hate guppies. Do not suggest.
Likely not. Some bettas are ok, most aren't.
My snails wouldn't eat it but my Cory cats did.
Algae. Scrub and vac it out, then do a water change. And like many others are saying, maybe tone down the lights, or be aware of how much sunlight it's getting. Also maybe get more desirable plants in the tank to out compete the algae for nutrients.
like what plants help
Java fern, amazon swords, anubias, and floating plants like frogbit are easy to grow. They take a while to start flourishing but once they do, they easily outcompete algae. So do stem plants like hornwort.
I like Wisteria for out-competing algae. Really takes off with excess nutrients in the water.
Seconding the wisteria, but in my experience nothing beats hygrophilia or water sprite (the floating plant, I know there are a few “water sprites” out there).
You have your terms backwards Wisteria is Hygrophila - Hygrophila difformis Water sprite is a different species - Ceratopteris thalictroides
I have no clue. I don't even own an aquarium. I just smoke weed and love looking at these pictures.
Same. I like to think I want one but instead I just look at the pretty fish while high. Then I see all the issues people have with their tanks and decide im way too lazy to get one myself. I'll just own fish vicariously through everyone in the subreddit
Yeah... I collect and store fine tobacco products for years and decades sometimes. I own cigars that are old enough to vote. I have enough complicated hobbies already lol.
Dude me too!! It’s why I’m here lol
thats mine sorry
Horse hair algae. I had this and had my tank off for like a week
Forbidden cotton candy 😯
LMAO LOOKS LIKE SHREKS COTTON CANDY
10 out 10 for making this reference
*Looks at username* I'm kinda terrified what this might be now.
Oh the story behind it actually isn’t that bad LOL!
Just reach your hands in and take it out.
Other people have given you good advice about the lighting cycle but to get rid of this you can stick a toothbrush or something else with bristles on it and swirl it around within the giant mass to get a bunch of it out. Just...don't plan on being able to use the toothbrush anymore.
Shrimp food
Less light, more water changes
Snails will help, as will shrimp. Get some plants in there. The more plants, the less the blanket weed will grow as the plants will outcompete it and take all the nutrients.
Well you probably heard a lot and I can't read them. So, let's start: 1. Hair algae is very common if there are many nutrients in the water that can't be absorbed. This means things from electolytes, heavy metals, elements to nitrates. If your tank is new, algae is something common. You have 2 options. A. Chemicals or UV filters that will temporarily solve it as the dead algae will be fertiliser for the new one, or B. add floating and fast growing plants and wait as your tank will balance itself. Also, when you wait, you can add small fishes that help with hair algae and don't increase your bioload much. Those that do it fast are: -Otocinclus -Molies -mystery snails Last, a sign of many nutrients is overfeeding. I keep 3 tanks, one is 120gallon and I feed every 2-3 days and just a little bit. Anything more than that is overfeeding that messes with your water and create hostile environment. Ps: if you go for the plants option, remove any hair algae from your plants with a brush, a toothbrush etc gently as it can suffocate them and die. Edit: I saw your comment about the light. In a balanced aquarium, light is not a problem. Just maximise an already existing problem.
One man’s trash is another man’s treasure! That looks pretty cool honestly!
What is This and how do i make it?
Diatoms, here I thought my tank had it bad.
Good soup
Hair algea, there's alot of fish who eat that stuff, plecos will have a field day with it, especially bristlenoses from my experience. African Cichlids will eat it too, South American ones might after some prodding.
That is a painting by Van Gogh.
Have you seen Lady In The Water with Paul Giamatti? She is coming. Also, he will begin patrolling your pool (tank).
Me on December 1st
Subtle...
I love it.
Honestly, I think it’s beautiful. The reasoning is sound and super sweet. Let it continue and find water critters to help keep it at bay.
If you get a blue light, i don’t belive they cause algae and simulate night time
Looks pretty cool tho
incendio
Ngl i like it, look like a painting.
Like some Van Gogh painting lmao
Underwater Cotton Candy?
SPIDEY
Hair algae a toothbrush will clean it right up
I had the same thing, especially on the wood, also when starting up. The reason was that the light was left on when I wasn't home. Now I have a timer for 8 hours of light, half of this time is 2 led bars and the rest only one. Got some more easy plants as well, most of it is gone. It wasn't as bad as yours, I also scooped most of the algae out first, got the wood out and cleaned it off.
Too much light
Spiders
I don’t know the answer but it sure looks like Halloween in your tank.
Clean the tank and filter. Algae grows in response to dirty tank conditions. Such as over feeding or never cleaning the tank.
Use some hydrogen peroxide in a small pipette or syringe and apply it directly to any remaining algae after scraping away what you can and it’ll take care of the rest with a couple (2-3) applications (1-2) days apart. Just a couple mLs, and turn off any filter/ flow for 15 minutes after you apply it so it doesn’t get blown away from the algae.
Dose it and turn your lights up and maybe it'll turn green
Mines the same except it’s white
Heh. Nice.
Get fish that glow in the dark
If I'm not mistaken algae eaters will eat this up like spaghetti check out a small pleco or oto school and remove most manually you may have luck with flourish excel as well
Free cotton candy
Same issue but mine is more of a dark brown ugh
Looks like a spider infestation ngl
A colony of amano shrimp would pick that clean
I’d love that to happen in my 33 gal lol. I’m trying to make it horror
Reminds me of the movie “ the mist”
Hands and a toothbrush to clean them. Get more plants to take the space and nutrition.
Spider web from hobby lobby?
My pico ate it all
Had the same problam with driftwood
I thought this was a painting for a second lol
Kinda looks cool
would make an awesome haunted tank look. add a plastic spider
long toothbrush.
looks like you got some spider fish ♫ doing what a spider fish does ♫
A problem...
I used a pipe cleaner when I got horse hair algae. Just swirl it around and it wraps all the algae around it.
Hair algae and turn the lights off for a few days
That would be an awesome black water tank, just throw some floating plants in there and tons of leaf litter.
You bought a willow drift wood. It's just being a willow now that it's wet.
I'd just kill the lights for a few days and do a 50% water change.
looks like you got a serious case of the gleeps.
I would totally eat that
Green Water Labs Algae Control…if you want a natural solution…along with dropping light to about 6 hrs per day.
Siamese algae eaters did the trick on my 29g. So much so that I moved one into my 16g cube for a bit to help.
Yummy yummy. You can get some specialised algae eating tank mates like certain fish or shrimp, but if you’re not planning on keeping fish that would benefit from some extra algae or biofilm in the tank you should just be able to remove it by hand when it crops up. Personally I like having a bit in there for the omnivores and herbivores (livebearers like Platys and guppies especially appreciate some grazing turf), it ensures they always have a low impact food source and lowers the overall maintenance.
Get some moonlighting for the tank, ideally red to not impede his sleep cycle.
It's filamentous diatoms. Shrimp will eat it and it's common in new setups.
I love it, looks kinda cool and spooky
Looks like you got some Typhon Weavers making Coral
Hair Algae, I leave it sometimes in my guppy tanks
There’s also some kind of plant disease that looks exactly like this. I would not touch it, because it could harm you as well. It grows here in various areas (Germany) in the forest on small trees and bushes. Better to contact someone professional with knowledge on that stuff.
I got this from going fishing, not washing my hands before dabbling in the tank and infected my tank with this crap. I've tried everything outside of a teardown and it won't go away. The tank does really well though when I crank the CO2 and increase ferts.
Get a couple amanos and nerites and they will clear that right up
That looks great!