I run House and Garden coco drain to waist i start all of my babies and young ones around 5mil of A and 5mil of B !
I run tap H2o my bro runs RO we both add cal/mag. He adds 2x more than i need to because of the RO. He also stars the young ones around 3mills and doesn't ever get over 8mills. The RO is more sensitive but it will give you some great results and it will be consistent at every grow u have. FYI start low and raise your ppms up. I like to start off around 800-1000ppm RO start off around 500-800ppm
Peace
I run tap H2o my bro runs RO we both add cal/mag. He adds 2x more than i need to because of the RO. He also stars the young ones around 3mills and doesn't ever get over 8mills. The RO is more sensitive but it will give you some great results and it will be consistent at every grow u have. FYI start low and raise your ppms up. I like to start off around 800-1000ppm RO start off around 500-800ppm
Peace