In a long established tank, I have hammers, torches, leathers, an acan , a Duncan, zoos and a blasto. All of them purchased as frags and all seem very happy, yet very few seem to be growing to any degree. All are being target feed with a variety of food 2-3 times a week. My parameters are Alk at 148ppm or 8.28 dKH Calcium 485pp Mag 990 Ph is 8.3 Nitrates and Phospates are zero Salinity is 1.025 I started adding a Red Sea Mag powder additive yesterday to elevate it and realize that my Alk is a bit high. Is there something I'm missing?????