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I recently added 2 albino corydoras to my 10 gallon tank, along with a large chunk of Mopani wood. I've been feeding them less while the biological filter adjusts. However, I just noticed a clear whitish growth on all the lightly colored parts of the Mopani wood. The neither the corydoras or my betta seem to be bothered by it.

The water, which used to have undetectable levels of ammonia and less than 10 ppm nitrates, now is at about .40 ppm ammonia and 25 ppm nitrates. Nitrites are zero, same as before.

Could some of this be the strange growth, not just the new fish? Does anybody know what the growth is?
 

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I recently added 2 albino corydoras to my 10 gallon tank, along with a large chunk of Mopani wood. I've been feeding them less while the biological filter adjusts. However, I just noticed a clear whitish growth on all the lightly colored parts of the Mopani wood. The neither the corydoras or my betta seem to be bothered by it.

The water, which used to have undetectable levels of ammonia and less than 10 ppm nitrates, now is at about .40 ppm ammonia and 25 ppm nitrates. Nitrites are zero, same as before.

Could some of this be the strange growth, not just the new fish? Does anybody know what the growth is?
i believe it is some type of fungus or microbiological being. i dont believe it is harmful and ive heard breeders love it because fry will chow down on it. maybe some other member can chime in and fact check me as im not 100% sure im right and im just guessing XD.
 

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i believe it is some type of fungus or microbiological being. i dont believe it is harmful and ive heard breeders love it because fry will chow down on it. maybe some other member can chime in and fact check me as im not 100% sure im right and im just guessing XD.
Thanks- one of my younger corys seems to love eating it now, and has already cleared away a section as large as itself. Definitely doesn't seem to be hurting them! I'll be feeding a little less until it's gone though, haha.
 

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Thanks- one of my younger corys seems to love eating it now, and has already cleared away a section as large as itself. Definitely doesn't seem to be hurting them! I'll be feeding a little less until it's gone though, haha.
Great! always happy to help. how is the ammonia levels doing? did it go away? if it did then its very possible the ammonia spike came from the new fish and died down as soon as the biological filter could grow and catch up.:smile2:
 
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