Hi! This is my second tank with the same problem. It must be something wrong in the air. Tank is a 1yo Reefer 250, 2xKessil A360We, 50% int, 100% color (but tried different settings to no avail). Skimmer is pulling air from the outside, have a UV and a fuge as well. RS CP salt, parameters in check and stable between RS growth and coloration program, other corals, even acros are thriving. No matter what color, type of monitpora I offer up to the tank there is zero to little PE and zero to little growth. There must be something fundamentaly wrong with my approach, as I had the exact same issue with my previous tank (RS MAX 250), which had different lights, flow, water parameters, everything. All ideas are appreciated.