Originally Posted by InfernoST
Out of the box the reef crystals tested 480 cal and 11 alk
You might double check that Calcium level with another test kit if you're shooting for an exact number. Seems a bit high, depending on the salinity you mixed it up to. Reef Crystals has just recently changed their formulation, upping the calcium and alkalinity levels - but not 480. I *think* my latest "new" bucket of RC tested in around 420 calcium and 12 alk
after 24 hours of mixing (mixed to 1.025).