Yellowing on edges of leaves

My leaves are getting yellow on the edges. Can anyone help me identify this problem? Thanks

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In the pic looks like a lighter green is their more leaves doing that or just the one leaf ?

Could be magnesium but its hard to tell at this point. Unfortunately id say wait longer until it gets worse so you can tell what the problem is. Are you running any calmag?

It looks like the edges of the fingers were covered/overlapped by neighboring fingers, maybe damaged/chaffed a little from abrasion if a fan was moving the big finger. Looks like they just haven't been exposed to strong light and hardened.