This Week i changed the solution and flush with flora kleen once again. I have significant nute burns on many plants EC was rising on 1.7 optimum was on 1.4 to 1.5. Maybe the reason for this is the Lights I turn them up to 600w each now consuming 1300w with the led roundabout i need to make white foil over the tanks to get them not too hot inside. Big Bud have sorted out because he was dying and have put the biggest plant in one tank alone so they is doing beautiful :) Ph is Stable to 6.1 to 5.8 in each tank So far looking forward on many problems solving and knowing for the next run :) Happy Green Sunday :D