Recirculating DWC deficiency?

Strains: orange kush
Huckleberry kush v2
Mob boss
Night nurse
Blue magoo
Sunset sherbert

Equiptment:
Current culture 32 pot R-dwc
Glycol chiller
10x gavita
205 quest dehumidifier
2x 32,000 btu mini splits
Co2 burner
Dose-a-tron (auto ph)
Float valves
8 air pumps
R/o system with recirculating uv lights


Enviromentals.
Room temp 74-76 F
Humidity 50-45
Ppm (600 scale) 700
Ph 5.9-6.1
water temp 65 F
Nutes (last feeding) (170 gallon)
1000 ml A
1000 ml B
UC roots 200 ml
Magical 400 ml

Side notes- lights are 3-3.5 ft above canopy. Second run first time using new nute line. Plants were donated, being fed at 6.5 ph and 400 ppm same line under t5s. I have grown for 5 years prior to this in soil.

Issues. No yellowing at bottom or in fan leaves. Yellowing on top new growth only that fades to green at tips.
I will submit pic right after this.
 
0712170930.jpg
 
get a cheap 50 dollar or less microscope at least 30x ..and confirm if you have russet mites .

and or spidermites. spidermite IS visible to the naked eye RUSSET MITES or broad mites ARE NOT VISIBLE....microscope ASAP.

GFP
 
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