Just quickly I have noticed it takes wayyyy more phosphoric acid to drop the ph of tap water than ro water. But still nothing like the dose u are describing.
Mate have you seen @KCCO 77 ’s setup with his flood and drain table ? I am with you I used to hate dropping my tiny little seedlings into the big boy system. He seems to veg in the flood and drain and then switch to the big system just for flower. Plants really seem to love it, no messing with...
Lighting control parts arrived today, also a trolmaster humidity device to control my dehumidifier later on. Quickly tested the type f lighting adapter on one light. Seems to be working gonna hook em all up now.