Leaf issue deficiency or toxicity

Without a diary, it's pretty hard to give you a good answer here. We'd need a whole lot more information... Start a diary, join the community, and pay attention to what @midnitrtoker has said... and a p.s... EVERYONE has had a deficiency of some kind and if they HAVEN'T, they don't know what to do about them that actually WORKS... Good luck

I grow in 100% coco. I could tell you right now you are letting the coco dry out way too much. Coco is very different than soil or hydro. If it gets too dry it starts to develop ph and EC issues. You have to increase the amount of times you water a day if you water once a day up it to 2 is watering every 2 hrs I have it set up automatically. Hope this helps.

High JonMauto, This is a iron deficiency. While iron deficiency can occur in all grow medium, it occurs most frequently in coco coir. This is mostly because this medium lacks organic iron and naturally contains a high amount of salt, making iron less available for the roots. You need to flush the grow medium using water that has a pH value of 5.8. This cleansing process makes sure that there are no excess minerals that locks out iron. The next step is to follow it up in the next watering with an all-around nutrient solution designed for marijuana and ofcourse with a pH value of 5.8. I don't know what nutrients you are using. But I have been using Plagron Coco A + B for years and never had a single dificiency. I heard great stories about Canna Coco A + B aswell! Happy Growing! 😋