Fishinfreak
Aquarium Advice Freak
My sister just got a new betta from Petco (it's the closest fish store), and already it is showing signs of illness. It seems to not be able to sink, and struggles to get to the bottom, only to float back up. I have no idea of what's going on, so any advice is welcomed! My only idea is that the water was poor enough in the jar that it started breathing a lot of air, but this is probably wrong.