My second betta died last night. The only thing I have ever done that was against general advice was having a small tank. Its a half gallon and I have wanted to upgrade asap, but I've lost two fish in two weeks before I had a chance. They both came from Petsmart and both ended up acting the exact same. They got water changes as they needed them, I put things outside their tank for them to look at.
However, both fish stopped eating after 2 days, seemed to dart around alot, and became much less responsive to interaction from myself (like a finger on the outside of the tank). And then after a little while, the darting would stop, they just kinda glided around, which I thought was normal betta behavior (I had heard alot that they are very lazy). I had just purchased some melafix, aquarium salt, bloodworms, and a turkey baster I was going to use to clean the nastiness between water changes, but this morning I woke up to dead fish #2.
Keep in mind that I never kept them together, these are two totally separate fish that I got from Petsmart with their 14 day exchange program, they just happened to act the same. Is it possible that I am doing something horribly wrong? It is extremely frustrating that 7 year old children can have a betta live for 100 years but I, a 20 year old can't make one live for a week. I want to get a bigger tank before I try again... one with a heater and filter if possible, but is there anything I could be doing wrong?