ca test kit

Hey, I was looking into a cheap alternative to the more common test kits for calcium and magnesium, and I stumbled across this test kit from Amazon. (The link I posted seems to be missing, apologies) 10/11 reviews are positive, the test kit is a titration that's supposedly accurate to...

Phosphate ULR Hanna checker with 25 reagent Salifert Nitrate test kit with at least 45 tests left Salifert Mag, Alk, and Ca test kits in Red Seas enclosure All kits for $80 shipped Not separating. All pms asking to separate will be ignored.