Problem on my leafs

Do you suplement calcium magnesium or only vedge and bloom.. when usinh coco nutrients cal mag is often added in the mix, but when using vedging and blooming specific product a suplement is often needed the more the plant developoe into fliwering the more it consums calcium for growth.

Hard to say since I can't see what you are feeding them, but I would suggest checking soil ph first and make sure its 6.5-6.8. I would also be using just plain ph'd water every other time. Happy growing.