Boron or Magnesium deficiency?

OR JUST OVER FEEDING?

Made a bunch of small changes and this showed up. All changes 2 or 3 days ago
Coco drain to waste. Canna A&B 250 ppm. Calmag .75ml per liter (150ppm?)
Growing great. 55 days from clone (Triple Purple Rhino)
Moved to flower room under 600w HPS NEW Hilux Gro 600w HPS
New brand of PH down, GrowTek., Need about 7.5ml per 10 liters
New blue lab ph pen.(cal 500) dropped the old blue lab and replaced

Any ideas

smokey

Its neither. Its like a nute burn from wild ph fluctuations. Sometimes when its right, your plants are using up the nutes and sometimes its not right and nutes are accumulating, the it gets right again and there's too much. Im in soil, so gotta wait for a coco grower to chime in on the best ph. But thats the deal. Get ph more consistent or get microbes going. My advice is to do both.

Pick of the crappy leaves, problem solved and move on with your bad self, the rest of the plant looks good.

@Smokey57 hows she doing? I have one looking exactly the same way..