I HAVE A LEO AND A REG MOTORO ABOUT 6 INCHES IN A 4X2X2 120 GALLON TANK. WITH 2-XP4. 2-MAG 250 MICRON. UV STERILIZER. AND A CASCADE. 3 48 INCH BUBBLE WANDS. IT SEEMS LIKE THEY ARE ALWAYS BREATHING HEAVIER THAN THE RAYS IN MY OTHER TANKS. EVEN BEFORE THEY EAT. THEY ARE IN WITH SOME DISCUS WHICH I THOUGHT ONE HAD GILL FLUKES SO I PULLED OUT AND HAVE BEEN PRAZI. THE TANK. IM DOING 50 PERCENT WATERCHANGE TWICE DQAILY AND REENTERING THE MEDS. THEY BOTH ARE SWIMMING AROUND LIKE CRAZY AND EATING EVERYTHING. JUST THE BREATHING IS THROWING ME FOR A LOOP. ANY INSIGHT?