Gonzo, Consider this: Adding ~1g of MgSO4.7H2O per each litre of tank water will raise your magnesium ion level by 100mg/l; this would also raise your sulfate ion level by ~400mg/l or about 15%. This is because mag sulfate heptahydrate is about 10% Mg++ by weight and about 40% SO4-- by weight...
Mal, In addition to what Randy has said, I would be interested in knowing what your specific gravity is. You say that Reef Crystals has set your calcium level at 300mg/l and that seems a bit low for RC. A calcium level of 300mg/l in RC would be normal only if your specific gravity was around...
The salinity titration kits work by testing for chloride ion and then that chloride level is used to calculate salinity. This is actually the most direct way that I can think of to measure salinity. This only works when the chloride to sodium ion ratio (and the chloride to anything ratio for...
