I have a 20 gallon, with 10 gallon sump. Currently my tank is holding 2 medium LPS (frogspawn, and hammer each about 5 inches long), 3 montipora of the scrolling variety (2 are small frags, one is a larger cup about 3 x 3 inches), 3 acropora (2 small frags, and one larger 5 inch branching) Dendro family of 15 heads, and coco worm, 3 halimeda plants, and all rocks are covered in coralline algae. I try to keep my DKH between 9 - 10, and Ca between 425-450. I dose by hand daily, am and pm, usually 7cc of Bionic each dose. Some days my Ca is ok, so then I only dose 1/4 tsp of baked baking soda once or twice as needed. I like to test daily before I determine my additions, but I suspect that after I get more experience with my tank's needs, I will test only weekly, but add my 2 part on predetermined daily schedule.