So I have some cichlids they were in a 40 gal for the last year or 2 that's when I decided to upgrade to a 75 gal about a week ago. It took me a few hours to clean and get my filter switched over (it's a fluval 406) after that I had a slight ammonia spike (didn't get over .25 ppm) did wc every day till ammonia was gone my prameters are perfect now. However this morning my fish were acting of odd. Most of the fish were at near the top of the tank but they usually stay at the bottom. They have never done this before is this an O2 issue? I do have a spray bar and 2 small circ pumps. I will post a picture let me know what you gives think.