Make sure you disinfect the tank before you put another fish in there. Just hot water not sufficient enough Use clorox 1 to 10 (1 is slorox) Let it stay at least 30 min. Make sure you air dry it. Put it on the sun or just air dry it at home. Make sure you wash it a lot lot.....wipe it and wash it.... Wash it with hot water then warm water.
Also you really don't have to have 80 or 82* for betta 76-80* is the perfect temperature for bettas.
Also i used to recommend medication to treat bettas but i learned on this forum taht a lot of time you can treat disease with Aquarium salt or Epsom salt which is less stressful for bettas. Bettas very tolerant to salt treatment .
My recommendation if you buy another betta, buy aquarium salt and epsom salt just in case you will experience any problems. It like $4 each. Don't give up. Those little bettas need home and love and that is what you gave him.
Good luck. Don't give up.
Also i always research before i buy any fish medications. I don't believe that all of them helps. So be careful.
Last edited by ANHEL123; 02-09-2012 at 02:26 PM.