Help, Fans leaves turning

Hello!
This is my First Grow ever
Soil: Fox farm happy frog
Ph: meter says 7.5 ph tester says closer to 7
Which I know is high I'm working it!
Nutrients: Having been using any besides Calmag
Plant age: 2 months? Not sure lost track of time
Problem: Foilage has brown spots around edges and some leaves are crisping and turning this odd grayish color. I cant seem to find anything about this. I've checked for pest daily and I have 0
Even checked with microscope under leaves, by stem, nothing.
I am growing indoor
Temps running around 80-85
Humidity at 45%

If its 2 months old you should start feeding, especially if you are not using large pots. get that PH to around 6.5-6.8. Temp is ok but not higher. Did you already switch to flower or you still vegging?

Using 5 Gal bucket
Switched from 24 hr to
12/12 Prox 1 and 1/2 ago
(Exact age of plants I dont remember heres a picture but I imagine it's around 2 months)

the plant looks really healthy to me. Tell me about how much/often you water?