Hello and welcome to the forum
Looking at the dark green plant right side front.
Very dark green. Suspect - A little heavy on the nitrogen for this plants liking.
Leaf clawing. This is a sure sigh of over feeding Nitrogen.
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This plant is in flower now but not finished stretching. Normally I'd say continue feeding until it stops stretching but with an over abundance of nitrogen in the medium. I'd suggest you cut your grow buy about 75% and adjust flowering mixtures according to chart.
All in all your plants look pretty good bud. I think if you just tweak a few miner things your well on your way to having a great harvest.
Tips are not burned. I'd say no salt buildup issue.
Nice and shiny leaves. Calcium levels are right on.
No obvious magnesium issue.
I suspect a little over watering but not a real issue.
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Look at the little stem between the branch and the leaf. If the stem is straight and solid looking but the leaf looks droopy. The plant is pumped full of water. This suggests a little over watering.
If this little stem looks a little wilted and the leaf is droopy. It could likely stand a little water.
Try and give them another day between watering and feeding so they dry out a bit more and see how they react.
It's getting onto clean up time. Check out this video . Fast forward to 8 min strip to the tip!
I know how hard this is to do. But if you want really prime top cola bud rather than some nice tops and a bunch of larf.
This how you do it. Try not to go overboard with blooming fertilizers, keep your Potassium about 30 ppm and phosphorus 60 ppm when finishing up.
Hope this helps you.
Ron