This does look like a nute problem. Doesn't the micro of GH have magnesium in it? I can't remember where the calcium is, which bottle it's in. 280 for tap seems a little high. I wonder if it might be better to use distilled. Are you sure it's mg and sulphur def? It doesn't really look like sulphur at this point, or mag def. I wonder if you add some of the GH nitrogen, green bottle right?, that this might change. Are all plants showing the same thing? No clue about your dropping pH. You don't have a cat that pees in the buckets, do you? I'm kidding. Seriously, try distilled water and consider modifying the nutes some. Look for an element that might be missing. This could be missing boron or moly. Hard to say.
polishpollack Reviewed by polishpollack on . RDWC ph dropping daily, lockout? 291815Temps air:68-78 Temps reservoir :68-72 Nutirents:Lucas formula 0-8-16 general hydroponics. (Floro micro hard water) Water:tap Ph:5.3-6.2 once I put in my nutrients solution I then adjust ph using ph down or dynagro protekt for ph up. By the next day it goes from 6.0 to 5.5 sometimes it's not as drastic but it definitely drops almost every hour. Ppms:900 291814291814 Lighting:4x1000watt 10x12 room Strain:la confidential I seemed to show signs of my sulfur deficiencies a couple Rating: 5