I have to agree with Hermie and manufacture. Put some nutes in the water and watch it stablize. Kind of answers some of my questions about chasing PH. The higher my PPM's with 5 ml's calmag the more stable while light nutes and calmag I'm chasing it down. They put something in the water here so the marines don't go crazy when they come back and it kills plants. LOL

I will try too backing down on the calmag. Might just save a plants life.
LOC NAR on probation Reviewed by LOC NAR on probation on . RO H20 + Cal Mag Plus = Unstable pH Hello farmers having some pH problems. Here's the setup... 20 gallon tote with 6 airstones for a bubbling DWC for seedlings. Inside the 20 gallon tote there is currently 15 gallons RO H20 w/ 75 mL of Cal Mag Plus (5 mL per gallon Cal Mag Plus). There is nothing else in this reservoir. Air temps are around 68 degrees farenheit and water temps are between 63 - 68 degrees farenheit. Rating: 5