Are you running the GH program or the Lucas variant?

Additives?
rhizome Reviewed by rhizome on . PPM Levels - after reading; still not sure Just some quick background. I have some California Orange Bud that is about 4 weeks in. It's in a Rockwool Hydro-Drip system and currently under a 400w Sunmaster Cool Deluxe MH light (Lights are 21-inches above tops). For nutrients I'm using the General Hydroponics 3-part system as well as Cal-Mag that is added to distilled water. Picutres attached are from week 3 and week 4 after they were seeded. I've been reading all the posts about PPM and I've used the chart Zandor provided Rating: 5