Plants need your help!

I'm growing in ffof. And I use fox farm fertz. And have been using them in minimum doses....

Plants are less than 2ft high in 3 gallon pots on the 4th week of flowering...
Lots of people seem to experience this around week 3 - 4 from what I've read...

They all look pretty good except for a few leaves, I want to catch it before it gets worse... so.. it's mostly just the spots you see, except for one plant that doesn't have spots but it is purpling a little on newest growth (not sure if it's the good kind) and on its lowest growth there's what is definitely a N deficiency... but!! I'm not sure it's actually deficient.. I ordered cal/mag just incase it's that... and I've read Epsom salt foliar spray is good....
Out of all that I've read..
it sounds like p/k deficiency...
cal/mag deficiency...
Or the start of rust fungus... which I have 2 fans on low and a dehumidifier going... so.. here are the pictures..

Calcium deficiency

hotrodharley said:

Calcium deficiency

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Thank you for your reply. what would you recommend? The CaliMagic i ordered should be here tomorrow. will that be suitable? or is there something else i could do that would be better?

QuikWay said:

Thank you for your reply. what would you recommend? The CaliMagic i ordered should be here tomorrow. will that be suitable? or is there something else i could do that would be better?

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That's perfect. Suggest cutting back on any Grow a bit because of nitrogen .

hotrodharley said:

Calcium deficiency

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^

yes, calimagic is good

Beachwalker said:

^

yes, calimagic is good

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hotrodharley said:

That's perfect. Suggest cutting back on any Grow a bit because of nitrogen .

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awesome. thank you for the response.