These fucking spots keep popping up on leaves of my G.H.S. Hawaiian Snow. Its been happening since it was like 2 weeks old. Its growing in FF Ocean Forest soil. I think its the PH in the soil cause its like at 6.9. Ill be getting a water tester and Im gonna start feeding it water at a 6.0 PH mixed with Grow Big, so I can get to try to get the PH of the soil down to a 6.5.
They start from the middle and work they're way outwards

Heres another pic

Underside

This is when they culr up.. and get fried on the tips
Id really appreciate any help on this problem. Do u guys think that its a defeciency..or toxicity??Mg or Cal deficiecy???