GrowBot
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i am currently having this problem with advanced nutrients as well. i am using r/o water too and all i can do is add ph up bc of the severe drops. i i dont think its the nutes bc i only water once a day, mix my nutes 12 hours prior and after i water then the ph steadily declines. hope somebody can chime in and let us know whats up
I know this may sound stupid but did you check your meter? Maybe a new battery would help.
Salt Softened water will kill your plants and f'up your ph bad. Also if you have salt softened water you have to get it from the line before it gets to the softener. (The Hose)
But if you have city water not a problem.
Try mixing the two R0 and hard water or city water at different ratio's. Also try a different brand of ph down. I have had this problem with RO before. It bounce's around because it's so clean and there arnt any buffers in it after you clean it. I just use hard now but when I did use my ro I think I used a ratio of 3/1 1 being the ro and it worked. Also it could be the ph down I think the earth juice ph down might not work well with gh.
I mix my 400 ppm 7.4pH tap with my ro until it is around 125-150ppm. This will offer you some buffering. JK
House and garden sell a PH stabiliser that guarantees a stable ph for 7 days,
some nute companys do there own brand specific ph up and down.
I had the ph rising prob as well so now i use a res for dechlorinated water and a bucket to mix just enough nutes i need each watering.
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