Please help!!!week 7 sativa getting brown rust look on top of canopy

Week 7. 2 600 hps pretty close to lights due to stretch about 12-15 inches away should I worry?temps 77 all times rh 35-40. Using roots organic for soil and general hydroponics go box. And also add a little rock resonator I have 8 in there and the sativa its a Russian strain other one look great
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Looks like a Ph deficiency. Early.

Rais ethe light, 12inches is too close, light bleaching damage is a major issue with your final weight as you lose leaves from the top. I doubt they are still stretching at week 7.

I can't raise my lights anymore first sativa grow all my other stains are great any suggestions would be greatly appreciated! Keeping it green!
Next time I know how to control them. In veg. Thanks *BUDS

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Id keep it simple and not put abuncha nutes in it. It can throw off your ph and cause deficiencies. Just use your go box only, and see if you are getting enough cal/mag in that regiment. Quite a few lines need a cal/mag supplement and thats what this looks like you need

Hey * BUDS since I got digital ballast can I bring down the watts? Like 75%. Would that help with the light bleach

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Hi do my plants look healthy please as they was wilting last night