I've only done soil and coco DWC growing so I really can't help with a drip system too much. Are you using Hydroton or rockwool. The media can affect drain-off EC and PH. I learned the hard way that it could be best to measure both and flush until both no loger affect running water/nutes through.



The more info you provide, the better someone can help you. Not trying to pull your chain or anything, just trying to be helpful.

No one here wants to give you bad advice.

M.P.