Calcium lower each day after using new product

[fkshiu]

I'd go through some of Randy Holmes-Farley's articles about the interrelationship between Ca and Alk in a reef aquarium. I know he's not a big fan of Liquid Reactor-type products concluding that it's not much more than liquified aragonite sand in a bottle.

If I were you I'd start dosing CaCl and Sodium Carbonate in equal amounts to bump up Ca and Alk to acceptable baseline levels before experimenting with Liquid Reactor again.