So after using a crappy RO/DI for months that was adding 50+PPM to my ATO and water changes. I upgraded my RO/DI. ZERO PPM.. Did a dose of Chemiclean. Worked but slim keeps coming back. Had NO negative results but don't want to keep dosing.. Not a big chemical lover! Started a batch of phosguard a couple days ago in a reactor. Using slow water flow. I am guessing the phosphate is still in my live rock?? Any ideas of how long it will take to stop leaching? or do I have another issue?