Interesting, you have issues with water PH changes also.....Mine varies anywhere from 5 to7.5 after a 24 hour sit. I RO to remove iron, so no junk to worry about. I find that my changes occur the greatest when the weather dumps a bunch of rain. I do not know why and I have not talked to the city as no need to enact red flags.

I have in the past damaged my plants from these changes. BUT, the good old drop test kit keeps me in the safe range and costs a minimal amount. Those fancy PH things concern me as to how long they may or may not function properly. I have adapted to the drop kit and it works for me.....I am such a fan of the KISS methodology too.
WashougalWonder Reviewed by WashougalWonder on . im done jacking around with ph problems i've got several grows under my belt some turned out fantastic and others kinda suffered a little. my biggest problem has been with ph (im a dirt farmer)my tap water changes so much it is hard to keep up with. i have used the drop test kits with varied success over the years and have tried a few different ways to adjust the ph of my water. im at the point of disgust with this round. tap water has been jumping around from 7.5 to 8.5 all summer. i do let my water stand for a day or 2 before using Rating: 5