Thanks guys. I have actually been PH testing and adjusting all my water after adding the various nutes. PH would generally be a little too high so I have used a little vinegar to lower to about 6.25 each time.

To get the runoff test done I have to soak my babies and it scares the hell out of me. The roots are still small so what if I took some dirt from the pots and soaked it in neutral water for a while and then tested that ? (anything to avoid soaking!)

Thanks again