[tieme]

They are seedlings, not clones. They just stretched a lot due to the light being too far away when we started them. They have been in rockwool the entire time. I have presoaked the rockwool in ph 5.5 solution. I do allow the chlorine to evaporate (hence the bins I described that I use to age the water).

It is not the rockwool that is causing the ph to drift though. I ph adjusted one of the bins so that I could water with pure water since I had originally thought nuteburn. Even this water's ph drift up exactly the same as the nutrient solution.

On a side note...how accurate are the chemical tests? Is it possible that I only THINK I am at the correct PH but the test sucks and maybe I'm at 5 or 7 or something?

Thanks again guys. Keep the input coming!

o/
Tieme