What’s growing on my wood?

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Bret11

Jack Dempsey
MFK Member
Oct 10, 2018
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I have something that seems to be growing in my wood in my freshwater tank, anyone know what it is, some pics below

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It's quite common to get that white mould type growth on new wood added to fish tanks.
It's harmless and nothing to worry about. You can rub it off with your finger or just leave it to go on its own.
 
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Looks so fluffy
 
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Looking again it looks a bit like algea.
Has the wood been recently added?
If not it could be algea.
 
ALGAE FOR SURE. Dose the wood with peroxide full strength.....let sit for 5 min and then rinse and return to tank. The algae will turn redish in color and the fish will be able to eat it......it will then die off in about a week. Or leave it. Looks quite natural. I keep changing my opinion on it.
 
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Thought the same thing as Stanzzz at first, the stuff you sometimes get on new wood in a tank (harmless), but apparently not. It's a matter of taste, but personally I like it.

I do woodworking, carved bowls and stuff, and collect a lot of downed wood, burls, etc. I leave it outside until I'm ready to do something with it and I find certain species of wood will grow their own types, colors of lichens, etc., some of them grow stuff that's unusual and pretty spectacular. For example box elder around here can get these very large, sort of trumpet-into-fan shaped, mushroom-like growths on it, hard to describe but pretty spectacular if you're into that sort of thing.

--The relevance I'm suggesting is that maybe you have a less common species of driftwood so it's growing an algae (or something similar) you don't typically see in a tank.
 
It is black brush algae. It is very tough to get rid off, and I know of no fish (or anything else) who would eat it.
If is is limited to the wood, it looks pretty cool.
If it gets on the plants (usually on edges of leaves, and on stems), it it a pain and very difficult to solve. Only cutting affected leaves or branches will work IME.
Underlying causes need to be solved. I currently have it myself in one of my tanks and am battling with it. Very frustrating!
 
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It can look really good. Personally I like it an never mind it growing in my tanks.
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You can see it here on the rocks in my tank.
 
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PEROXIDE. Changes it and kills it. Cheap and effective.....on plants too if you can remove them. Turns red and then my Flagtail and plecos go to town on it. Within a week or two it is gone completely
 
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