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pH Keeps Rising By The Hour. Please Help!

Hey “growmies”, need some urgent second opinions.
Currently running an 8 plant recirculating top drip fed system, feeding for 20 mins every hour. Rockwool and hydroton as medium.
Rez is 60l (~13 gal). I know its a bit small for the number of plants (was planning on a sog type set up) but bearing in mind they’re only baby girls right now at 1.5 weeks old.
RO water. Res temp hasn’t exceeded 20C/68F.
Running Canna nutes (vega a+b, calmag and foliar spray rhizo right now) with calcium...

pH Keeps Rising By The Hour. Please Help!


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