when you do your water changes seachem prime will help make the ammonia less toxic until you do the next water change. you might have to do 2 changes a day until the ammonia is at 0. i think the problems are from the tank being uncycled and not any other disease. i wouldn't treat or add medication until you get the ammonia level to 0. how long has your tank been set up? what are your other water parameters? nitrites, nitrates, and ph? if you don't have the prime water conditioner i would get that at your fish store and use it right away. do you have liquid tests? the strips aren't as accurate and it's important to get reliable results especially when you are cycling the tank. also google aquarium cycling and read about the process and what to expect when you do a fish-in cycle. good luck.