yes im not quit sure on this myself mabe someone will chime in and help us both out !!!Sorry to hear this BK! I thought u had it licked. I think you did the best thing and that's flushing. now you got a restart and learn from this.
My question is I read allot of different ideas as to how to get the right ph. I have read from good posters that what goes in is what you shoild be concerned about. PH runoff will not be true because some nutes will stick to siol and will not give accurate readings.
Others say after u get your first runoff PH then you need to up or down it when next feeding so reading you should get 6.5 runoff.
which is the correct way??
I hope you get things turned around!
I am very confused as which way to go?
BK I don't think it's your pH pen as long as you're getting the right reading with your buffer solutions.

hey guys ! hope all is well , we got this solution sorted now bk ? all i focus on and all i ever have focused on is the pH of what is going in , sure sometimes i check what comes out , both your northern and auto hash have been getting the same mix that you have done, both plants get the same pH infeed , the super hash as far as i know has had no problems what so ever, is there anything that you have done different for either plant ? as far as i know they are both in exactly the same grow medium .. is that correct ?