:( so i put my betta back into the tank with the danios and cories but ended up taking him out again for the same swollen abdomen problem. when he is in his own tank his belly goes back to normal. i guess he is destine to live a solitary exsistance poor fellow. he seems so happy in the bigger tank.
also i asked about the water conditioner because i have already treated the bigger tank with the betta stuff i was worried if i put in the other conditioner it might harm my fish.