Thanks guys, you guys are the best. :) anyways, I'm starting to have my doubts about age, I had only had him since a little before Christmas I believe. But he is a petsmart betta, and you know how badly they are treated. Anyways, I am thinking of getting another one. How do you properly prep an already-filled cycled 10g with 5 tetras for another betta to rule out any illness that could have possiy come from my betta that passed on? :( I love bettas and can't seem to pull myself away from them. I always say okay, I'm done no more when this guy passes away, but I love them so much!