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Discussion Starter · #1 ·
I have some Heterandria Formosa fry in my tank that appear to be, umm... sinking, is probably the best word for it. I know that (at least i'm pretty sure) that fish have to have a first breath of air, but these fish have been swimming around for a couple of days now. But today when I got home, I noticed that a few of them were having trouble staying off the bottom, They could struggle to the top, but then they would just sink back down. I have a thin layer of surface film that I don't know how to get rid of, but it was never a problem in the past. Also, the adults are doing fine and eating well.
 

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Fresh Fish Freak
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Sounds like a swim bladder issue. Many fry will grow out of it.

I'd try to address that surface film, to be on the safe side, though.

Also- any chance you're feeding them BBS and they may have eaten some shells?
 

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Discussion Starter · #3 ·
The food I feed them and the adults is a mixture of "golden pearls" and decapped brine shrimp eggs, so mabye that could be it but I doubt it because the adults eat a ton of the stuff. Also, how would you suggest getting rid of the surface film?
 
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