I already used 2 16oz bottles of Stress Zyme and 40 pounds of Eco Complete gravel. My Nitrites are around 3.0. Nitrates are at 0. Talked to someone at the lfs and he told me not to change the water so that it would cycle better. Would a change be better or make it worse? Should I try to remove some fish for now. I have a couple Stingrays in there now with 2 - 18 inch Eels, 1 - 5 inch Datnoid, 2 - 3 inch Clown Loaches and 5 - 3 inch Pikes. The tank is a 180 and I am running a 75 gallon wet/dry.