Brown scum?

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Fiferjanis

Aquarium Advice Apprentice
Joined
Apr 2, 2013
Messages
39
Location
Massachusetts
Status 75 gal. Tank, water/substrate/decor added early March, ~7 fish added late March - end of cycling.


What is this brown stuff accumulating on some decor? Algae? No real plants in the tank, just fake.

I haven't seen any "noticeable" algae, but I wiped down the front and sides with a magnet scraper, which made the tank noticeably clearer, so I imagine it's in there to some degree.
 

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Sounds like diatoms, which are a type of algae that tends to pop up sometime in the first four months or so of a tank. They tend to be self limiting and go away after 1-3 weeks.
 
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