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Full Version: Bottom Film/scum
RafflesGold Forums > Discussion Area > Green Water, Filtration and Tank Setup
Brown film or brown scum if you will is on my tank bottom and tank walls. I do not have any gravel. Is this part of the biological filtration? Should I wash this off/Can I wash it off? My goldfish do not seem to mind it. I do not really care about aesthetics.
Sounds like brown algae:;hl=brown+algae
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