---------------------The story of my tank--------------- Ca: 430ppm Alk: 4.3 meq/L pH 7.7 ŕADD KALK Ca: (I dont even bother once I see my Alk) Alk: too high to read pH 7.9 ----------------------The end--------------------- it is time to rewrite history for too many years i have been a slave to low pH, kalk drips and resulting high alkalinity, the Strategy is going to be simple…. aeration!!! Air stones are going in the sump, windows in ...