I have been dealing with high nitrates and PO4 for about a year. Got my ATS installed and it has fixed those problems. I currently have a fish only tank with live rock, since most all my corals died off. If want to add SPS and LPS corals soon, and was wondering what I can and cant dose with an ATS. I have heard that Kalk and ATS do not work well together. What additives should I use to keep calcium and alkalinity up without killing off the ATS?