Calcium defiency, get some garden gypsum and sprinkle a few handfuls on to of the dirt before you water. Very little danger of harming your plants with gypsum and it will add calcium and sulphur.
The leaves won't improve but it will keep it from getting worse.
I used cal mag the last water befor this water i just used fox far grow big at like 1/4 strength should i up the amount of cal mag i use and the grow big . My soil ph is also a little high its like 8. Somthing how can i lower the soin ph so all nuts are taken in
Lemon juice or vinegar works as ph down but it takes a whole lot. If you haven't been pHing your water that's probably why you got calcium defiency.
If your ph is way off it will lock out certain nutrients. You need to get some ph up and down and a good ph pen for sure.