So I treated my betta for fin rot (he was biting on his tail and developed it) and transfered him to a 2G tank so he can have clean water. I used aquarium (1/2teaspoon) that i put in gradually and then treated him with melafix (I added like 2 drops it said 5mL per 10G). I come home today and my betta has lost his color and you can see his veins on his body where his fins begin!! HELP!! What should I do?!?!?!?
*He was in a heated 10G tank with 3 neons and a small cat fish. Heated and used a dechlorinator with added materials for bettas/ tropical fish. It is filtered and I feed him one pellet a day (hes not much of a eater). I do weekly 25-30% water changes and vacuum the gravel weekly