I tried them all except tropic marine,reef cyrstal is high in alk,i was trying to get my alk down is was at 12.2dkh,cal 460,mag 1320,i switched to coral pro salt,its by red sea,its guarantees using ro water an sg at 1.023 cal 450 alk 2.5 an ph.8.2,i will use it for a few water changes to get my...