Hey everyone,
I have a 10' x 12' NFT system with Amhydro channels and a buried 50gal drum. I am using Peters professional hydroponic special, magnesium sulfate, calcium nitrate.
We have been growing lettuce with really good results without monitoring pH very much, changing out the reservoir often.
Lately I have been checking the pH and it keeps rising to around 7.6 after running for a day. The PPM is dropping, so I imagine the plants are using up the more acidic elements causing the pH to rise, but this seems like there is something else going on. I use sulfuric acid to drop the pH and it keeps going back up.
Is this normal with NFT systems? My Kratky Floating raft system stays at a stable pH level with the same nutrients. I am wondering if the algae in the NFT is causing this. Any advice would be greatly appreciated.
scfalconry
scfalconry
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frontyardfarmOriginal Author