Reef Advantage Calcium is calcium chloride product with a few extra's thrown in. This will help raise the Ca
levels in your tank. Calcium carbonate is not an additive. It's what carbonate/bicarbonates (reef buffer) form when incorporating calcium within the system or deposited by CaCO3
organisms or through abiotic precip usually as a result of heat.
, if using a properly balanced saltmix, that is usually the best means of bring the waters chem back into ionic balance through repeated water changes. Then maintenance is going to be much easier. As Billyz suggested, two part liquid additives are typically easier to use over the long run unless you have heavy depletion.
What levels (alk
) does your saltmix test at?