Ok, made it home to see plants had a rough go at it while I was away. Looks like cal/mag but I recently started using it, im thinking with all the heat this past week maybe a bit of heat stress. Atleast I'm hoping its only heat related.
The problem is only showing up on the top 2 or 3 fan leaves, lower leaves not showing signs of any problems & even the smaller upper leaves are looking good, chrystals everywhere !
Somebody let me know what u think this is please, thanx