Asked this on another thread of mine but it got no response, I'm having a fading issue with my sps colors. We narrowed it down to not having proper nutrients amd a slightly low alk for thid....as it turns out I'm running 0 No3 and Po4. At any rate I'm looking at getting either: the Red sea part A and B combo or the Korallen-Zucht coral system for non zeovit tanks, to help with nutrition. Any input on these?