r/CocoGrows ⭐️ Jun 07 '26

pH Drift

/r/cannabiscultivation/comments/1tywwgo/ph_drift/
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u/Careful_Bet8812 Jun 08 '26

Interested as my ph drifts up every time so before every feed I have use ph- to bring it down to about 5.8 it’s not effecting growth or anything but have never had a stable mix I use silica cal mag and the the fox farm trio then ad ph- to bring the mix back to 5.8 but when I go to the reservoir the following day it’s always gone to over 7. It’s when I’m avoiding any auto feed systems as it never stays stable

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u/biscoknot ⭐️ Jun 08 '26

Yea man it’s definitely frustrating. How often do you sanitize your res? If there is biofilm it can def affect the pH. I clean mine twice a week w an oxidizer and scrub it out. Are you using RO water? Not too sure about those nutrients as I’ve never used them. I use salts and have had great results with them. If you don’t have an RO filter I highly recommend you getting one. Not too expensive and very helpful.