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Currently I use kalkwasser in my auto top off (two tablespoons per 2gal of RO/DI water) to keep up with calcium consumption in my reef tank; I have lots of stony corals.
I add sodium bicarbonate two or three times a week to replenish carbonates and keep alkalinity levels up.
My mg levels seem to hold steady 1200-1350 range between water changes, though every now and then I'll have to add magnesium if I go too long between water changes. When using different salt mixes, mg would sometimes have to be boosted up.
Last edited by kaybee; 01-09-2013 at 04:33 AM.
African cichlid and saltwater aquariums