I'm reading into dosing this in my tank but I'm wondering if I'm getting a little ahead of myself. When should I start worrying about This? I currently do 20% weekly water changes and my tank is only stocked with about 7 frags, and a large colt coral, I'm thinking maybe I'm not losing enough calcium yet to have to worry about this (not sure haven't tested daily to see how much loss) should I start dosing or wait untill my tank is a little more stocked?