O.k I've flushed the pots and added new water and nutrients. My mix is 10ml of DM flower Max™, 5ml of DM Zone™, 5ml Earth Juice™, 15ml/15ml Plantastic 2 part bloom to 10 liters. Which has an EC of 1.8 Which I dropped to 1.6 with some extra water once it was all in the system. After adding nutrients my ph comes out to about 6.0. I rarely have to play with the ph until I start using DM potash which contains Phosphoric acid. I bought a new aerator today which is going nicely for the two main plants. Their roots have exploded out the bottom of the 20L upper pot of Hydro-Ton and most of the tips have turned white from all the pistils. I'm going away for three days so I'm jacking the lights up a couple of inches. It will be great to see the difference after a few days of not seeing them.