Help maybe calcium deficiency?

Weird spots Just started this week I feed with cal mag in my solution 3ml per gal feed twice day 300ml each feed Athena blended line ipm twice week hour after lights shut off 728ppfd roie720

yes, slight. Try 5. Looks like some light/heat stress too.

what light you using??

i think most run 5ml calmag in coco?

visajoe1 said:

i think most run 5ml calmag in coco?

Click to expand...

sorry guys.
5x5
Automatic temp humidity control
6” in-line exhaust fan
hybrid indica dominant
Rockwool 4”cubes
RO water
Athena blended line 1.2 ec
65% Rh 82*f leaf temp 78-80
VDP 1.1 - 1.2
ROi e720 at 35% 728ppfd 35” height from canopy
18 hour light cycle
Hand watering 300ml twice a day getting 10% runoff at second water @ 2.5 -2.6 ec. Ph6.1
Ph 5.8 using balance (ph Down) 1ml per gal
Athena cleanse 2ml per gal
Calmag 3ml per gal (bumped up to 4ml today)
Grow a and b 4ml per gallon each
Using photone app for light meter with full spectrum led setting with diffuser

richnof said:

what light you using??

Click to expand...

ROi e720