I have an aio tank that I made from a 40 breeder. I'm running biomax as a bio filter and I'm using filter flow thats cut to the size of one of my baffles for mechanical filtration. I'm running a 400 gph return pump on one end with dual nozzle return lines and a 440 gph power head on the other. I just checked my ammonia, currently at 0.5

. The clown will swim around for a bit then go back to the bottom and rest and start gasping then go back to swimming etc. I did some occasional phantom feedings for the course of almost a month, is it possible the tank didn't cycle properly or at all?