fwiw, in my reef (sps) i use b ionic and weak kalk, i have never used anything but b ionic so i dont know what the concentration of the brs solutions are, but 150 ml /day in a 90 seems pretty high. im running aprox 65 gals and am using aroun 20-25ml/day b ionic and aprox 1.5 gals/day of 1 tsp/gal kalk mix. again good luck zsu