I recently lost my betta, Martin, and am now considering getting another however I want to know if I need to clean the tank.
Martin was sick for a few months and I think it was internal parasites. I treated him in his 2 gallon tank and was working on setting up a 5 gallon in the meantime. A couple days before he passed, I moved him into the new tank in hopes that it'd help but it didn't. Now my question is, since it may have been internal parasites, is there anything special I need to do to the 5 gallon to ensure a new fish won't get infected, and if so, how should I do that? It has a TOM filter, one real plant, and he was only in there a couple days, if that impacts anything.