Right now I have a 50 gallon corner tank with a 20 gallon wet/dry sump. An in sump protein skimmer Just installed on 07/15. For fish I have 2 blue damsels 2 dominoes, 1 perk and a dog face puffer that I am ready to extract if i need to. About 25 pounds of live rock and the tank has been up for 3 years. My last purchase is the light. I plan on getting a 24 inch 150 HQI Metal Halide, 24 Watt T5 HO, 15k Metal Halide bulb, 24 watt Super Actinic T5 HO bulbs. Unit cooled by Ice cool fans. Unit comes with 2 switches so you can independently control the metal halide and T5 bulb separately for the dawn and dusk effect. These are my true correct readings. Magnesium 1000, Calcium 450, Phosphate .02, PH 8.0, Ammonia 0.00, Nitrite 0.05. How exactly should I use the Ocean blend Calcium and PH/Alkalinity? The directions are kind of confusing. I think it said to get my levels up to normal( Which they are according to the readings ) I think. Then add 1.0 ml of each for each gallon in a 24 hour period. Then what?