rapid breathing

Hey all... A newbee question really...I put brand new fish in a brand new tank 3 days ago(made sure the tank was settled and stable first) ... Ive got 2 gourami and a few tetra and gupys.. They seem vehery active and looking closely they are all constantly moving their mouths... Ive heard they...

Hi everyone! I'm still pretty new at this, but I have had had 3 neon tetras for about half a year now. When I moved back home for the summer, one of them suddenly died. I assumed it was because of the stress of moving between states. Currently, I have a 3.5-gallon tank. Two neon tetras, two...