Weird yellow tiny dots and discoloration on front of leaves

2x 1000 watt hps
climate controlled clean grow room.
Ocean Forrest soil 2 ND time using this type with issues.
pH water is 6.2
pH run off 6.48
Recently added a source of micronutrients to try to help but other than that it has been all organic just dirt and water.



We're growing a few indoor plants that are completely organic as far as from what we have done with it. Starting to get these issues on new growth and it's getting worse started towards the base of the plant but is working its way up. I can't find any bugs under the microscope the yellow dots on the back of the leaf look like small bugs but aren't and the spots on the front of the leaf are just dead spots any thoughts on this would be appreciated.

Likely under fed. Cannabis consumes a lot of fertilizer. Yellowing bottom up, suggests mobile nutrients deficiency. N P K. The spots P or K, general yellowing N or P. Red leaf stem, def P. Spots can also be Calcium another nutrient cannabis likes a lot of.

Thanks I've narrowed it down to that or bugs but haven't really seen any signs of them.I recently purchased a new pH pen and found we were at almost 7.5 pH so I hope your right. Thanks for your time