Hey, my names jack. Decided to join this forum because I have to restart my 30 gallon tank. Just started with having fish 3 months ago, have 5 betta's with separate smaller tanks, and 2 puffer fish in a bowl temporarily. I did have several other fish in one of my tanks, they lived happily for about three months together, the small puffers are the only survivors because the rest all died overnight and I can't figure out why.
Anyways, would like input for how to restart this larger tank with fish I can find at Walmart/petsmart/petco