My parents took a sample of Kaida's old tank water to get it tested and the results came back perfectly fine and that we could even put another fish in it.
Should we? Or should we sanitize it and then get it tested again before we get a new fish? The test came back that it was perfectly safe but I'm not sure because Kaida was sick and he could have left something behind when he died.
I don't want my next betta's to die because of us not changing the water or something. I want my next betta's to live longer then our previous one's. I don't think I could handle them dying in one night again.