I recently set up my 55g tank (1month)... I have 1 Red Oscar (5inches) and 2 Blood Jewel Cichlids ---- everything has been fine until about 3 days ago. I did a %50
water change with gravel cleaning and now my oscar is starting to be covered in what looks like cotton. Hes started acting very awkward....went from being very playful and active to laying at the bottom most of the time. This cotton-like thing is what im assuming has him sick... I need advice ASAP! I rescued this oscar and would hate to lose him..