ALWAYS PH YOUR WATER, CERTAIN NUTES WILL SHIFT IT UP AND DOWN AS YOU ADD TO THE WATER. FOR EXAMPLE ALL SILICATE SUPPLEMENT NUTES RAISE MY PH 2 SOMETIMES 3 POINTS SO ALWAYS PH YOUR WATER. AFTER ADDING NUTES YOU WILL FIND THAT IF YOU DON'T YOU'LL BE CHASING PROBLEM AFTER PROBLEM. I'LL POST PICS OF...