I have a reservoir which holds my nutrients until they need to be used. Recently I had added in a pump for circulation in addition to my air stone. Since then my solution has been rising to over 7 within a few hours. I adjust back down and it goes back up again? What the heck?
This literally happens in 3 hours. The plants do not touch this water untill it empties into the main reservoir, controller unit. So the plants have nothing to do with the problem.