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Old 11-29-2012, 07:26 PM   #1
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Default Strange algae growths

Hi, I am a fish tank novice. I've searched to find out what type of algae this is but haven't found anything. I'm concerned it could be harmful because it is brown/blackish as well as green.

These fuzz bubbles are only on the fixtures and not the glass, on the glass it looks like spot algae and a patchy bit of green with black/brown in the center. I have considered black brush algae but the fuzz is short like velvet, out of the tank it looks like slime.

I don't mind having this, I think it looks neat but I would like to know if it is a bad sign for my fish. I have 3 Harlequin rasbora and 2 new Otocinclus affinis.
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