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I've got a 10 gal lightly planted tank with DIY CO2 and a relatively small fish load. The other day while performing a partial water change I noticed a fuzzy white mold growing on the inside of the hood, around the lip of the tank, and inside the hang-on filter box just above the water line.
Is this an indication of something more foul? Is this harmful to the fish/plants? I know that mold spores tend to grow in moist areas (e.g. the attraction to the aquarium), but is there anyway to prevent the growth of mold or am I fighting an endless battle? Also, I live in Florida where the relative humidity stays quite high, especially this time of the year--I'm quite sure this is a factor.
Any help or advice is much appreciated.
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