Hello, so I have 6 rosy barbs, 7 prestella tetra and 3 dalmatian molly, 1 of the rosy barbs swimming weird, its hitting itself on the gravel and it was swimming on its side. And it got a big stomach, it still swims normal but its acting lazy/slow and nipping other rosy barbs , what should I do
It could be a swim bladder problem brought about by constipation. If you could fast the fish for a couple of days, it may clear up. If you have a quarantine tank that will be easy, if not you would have to fast the entire tank.