I have a 75 gallon tank with a wet/dry set-up, 2 Koralia 3's on either end for flow. 50lbs of LR, 6 fish, a few corals,some critters and 2 shrimp. The tank has been running for 6 months. All my water parameters are good.(that I have tests for) Phosphate,Nitrate,Nitrite and Ammonia are at zero...