yesterday one of my fish named porridge(black more) seemed to be having troubles swimming, he sort of kept flipping around with the current and when he used his little fins he kept going around in circles and today i came home from school and hes still doing it. I think hes ill or hes just moving around with the current of the filter and so last night i have him some fish fungal treatment and he picked up a little bit but when i came home today he is still doing it! what should i do what could it be please help me i love my fish and want to help him. thanks