I don't do uTube (my connection is waaaay too slow) but have a couple of questions...

Do you ph the ingoing water before or after adding the nutrients? (most nutrients will bring the ph down even further)

What's in that Other Tomato stuff? Did this start just after using it?

I'm guessing Magical is a calcium additive...? Is it by chance made from cane sugars or molasses extracts?

Are you using the Fox Farms online weekly feeding schedule, or are you following directions on the label? (use the online schedule) The bottles are usually labeled as if you are using that product as a stand-alone nutrient, not part of the package...

Although foliar feeding is possible, it's not the best delivery system for your nutrients. Plants are accostomed to nutrient uptake through the roots. Foliar feeding is inconsistent, overdoing it can damage the stomas which provide gas/air exchange, and with some homemade teas and additives, can grow salmonilla and e-colli. I'm not a fan of foliar feeding, except to correct issues.

The 'claw' is a good sigh that your ph is too low. Aim for a higher watering and feeding ph.

Doubtful it's a heat issue, as I deal with temps up to 100 degrees every summer. Heat does not make the leaves 'claw'. (that's 100 degrees WITH the A/C on...)