I am currently using I.O. for my salt and I am thinking of changing to Reef Crystals ... the reason is I cant seem to keep my Mag up ... thats really the only reason .. but it always dips down in the 1000 mark .. I can get it up to around 1300 and a week later is back down ... no matter how many water changes I do ... has anyone tested IO against Reef Crystals? .. I know that RC has more Alk and Calcium .. how about Mag???
Also anyone used RC and changed to IO??? why???