Grow light- HLG 650r @48 inches,1st setting
Clay pellets medium
PH- 5.8 +-.3
Nutrients- GH Micro, bloom,grow +Calimagic
Water temperature- 71 degrees F.
I changed out my reservoir 48 hours ago due to the leaves curling under and the leaves turning dark green. I lowered the PPM from 700 to now 320 based off of what I had read about possible nitrogen toxicity. I am new to growing so any advice would greatly help.