Tropical Fish Keeping - Aquarium fish care and resources

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MBilyeu 01-14-2009 06:16 PM

Film on the top of my water
I have been noticing recently that there is an oily film on the top of my tank's water. Anytime I add something to the water, including food, it spreads apart and the water looks clear in those places. I am currently taking care of two bettas in separate bowls(yeah I know), which I am doing 100% water changes every few days. One of the betta bowls and my community tank both have this film. The second betta bowl, and my 3 gal does not. Does anybody know what it could be, and if so, is it harmful to the fish?

Lupin 01-14-2009 06:41 PM

The oily film is protein. A lot of betta foods contain high protein content due to their dietary requirements. No, it is not harmful, just unsightly.

beweeb 02-27-2009 08:59 PM

what can you do about it
i have this stuff to and i am not real fond of it :-?

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