Okay, couldn't find any info on that particular brand of coco but let's assume it is washed and buffered ?In a potting mix Bloome & Gardener coco and perlite. Light is Mars Hydro FC 3000 its at about 30%. Don't know what par is at.
You must be using tap water that has plenty already in the water.Hmmm, I have not seen this...
As I said, just switched from 600w MH/HPS to Phlizon FD6000 640w, feeding the same and still Not adding Cal/Mag or ph down.
Cheers
Well water with ppm of ~500, ph 7.5You must be using tap water that has plenty already in the water.
Please note how the plants look saggy, the saggier the more pale green: they are not transpiring. Achieve transpiration first; try vpdchart dot com (hope this ok with mods who dont like links, its just a vpd chart made easy and ajustable).