they are alittle over 3.5 months old , rite now im watering every day , i have some final flush , im going to flush them in the am .. I am trying to build my self a drip system atm . I let them go to long , in veg , i didnt have my veg room complete due to getting to busy at work . should i flush with cal mag ? or just watter ? I just bought myslef a ppm pen today , i have a quick question . If i am using gh flora duo , its a 2 part system . how do i correctly ppm the right amount of both ? example if i want a total of 800ppm over all do i measure 400 ppm of part 1 and 400 of part 2 ? I am growing in coco sunshine mix # 4 i cannot repot them , i am going to go with a drip system after these are done , 2 4x4 trays with 2 1000w lights . any more advice would be very appericated