Need a little help diagnosing, thank you

Hello all, this is my second grow and overall it seems to be going well, but I've run into something I would like some second, third, etc opinions on.
Temps 74-85 rang mostly 80 F.
Soil is FoxFarms Happy Frog mix with OceanForest.
Under two 600 watt air cooled.
Nuts I'm using is bio thrive go box. Started at about 1/2 does two weeks into grow.
Now watering every 3rd day when soil drys up to first two inches.
Am now 3 weeks into grow and first began noticing drooping and hooked ends about a week ago. When I first spotted the drooping I believed it was due to overwatering and then let it dry out, but they still seem to be drooping. Also now the hooked ends are slightly yellowing. Only two of my babies are showing major signs of drooping and 3 or 4 are hooked and of those 3 or 4, 2 have yellowing in the hooks. Had some heat issues early on, but was able to resolve that so they do still show signs of heat stress. Pics below any ideas are welcome, thank you

Now watering every 3rd day when soil drys up to first two inches

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Bad idea and now the plants are overwatered . You water when pots become light to lift, for all you know it could be very wet below. They are in large pots for seedlings is another cause of overwatering.

*BUDS said:

Bad idea and now the plants are overwatered . You water when pots become light to lift, for all you know it could be very wet below. They are in large pots for seedlings is another cause of overwatering.

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Buds is right and you could be over watered.. Tips curling and burnt down...
It has been my experience that tips down is a soil/water issue...
If my tips point up then usually, low humidity, heat...

Now, maybe if you lift pot, it will be light as a feather...
Then, you have underwatered, let plant go dry, damaged roots, and tips curl down...

Let us know, over watered-usually a newbie mistake,
or
Underwater/nuted soil looks extra dry...

Yes I agree, I have been over zealous with my waterings. Will let them dry out some more and lift to check weight, but now I have another question. Once they get around 6-8 inches tall I plan on adding a screen to start a scrog... I won't be able to lift them much after. Is there another method to checking moister levels deeper in the pot? Perhaps a meter for moister reading deeper in the pot. I don't have a keen eye yet for watering times times. Thank you

Also with Bio Thrive being organic am I less likely to have nut burn or is it a myth that organic nuts are less likely to burn plants? Have searched many forums but got a mixed wide array of answers. I would assume less likely because they are generally slow release, but would Bio function in the save manner as true organic compost? And adding in that I have many outdoor grows under my belt, but this would be only my second indoor grow. Thanks for the help *BUDS, Sand4x104, I was second guessing myself.