Hello, so my tank is 90 gallons, 8 months old, I do not have a sump, or refugium. I have a skimmer, UV sterilizer, HOB FLITER AND AN oase canister filter. A friend recently gave me a PC RAINBOW ACRO, so I am in need of keeping things as stable as possible and I have never done SPS before. So my question is, what is the best method for this? I have read a lot about using 2 part dosing for maintaining calcium and alkalinity, but which is best? And when to use? Any and all help is much appreciated