Okay, so, I'm new here. I had a Betta fish for like a week, but unfortunately he died because of some bad advice from a store keeper (he tested our water and told us our cycle was complete--it wasn't and my fish died from what we think was nitrite or ammonia poisoning). Anyway, it has been...

Hello again. Unfortunately, we lost our last betta a couple of days ago after he got sick and we couldn't get him better. My 9 year old picked out a new fish this evening. This morning we thoroughly cleaned the tank and everything in it, filled it with conditioned water, heated it up to temp...