with the ferts in the soil, you really shouldnt feed them for a few weeks, with such a small root system that clones have they do burn easily

adding epsom salts all the time is not a good idea, you can not only build up a toxicity but if I remember correctly too much magnesium will lockout potassium(that you can lookup)

additionally you made to mention of PH other than what was printed on the soil package. Ph & over fertilization are the 2 most common mistakes , PH being over looked the most

everything that goes in your pots should be PH adjusted to the optimum PH zone of 6.5 - 6.8 for soil growing, this is most important for container growing, your leaves are showing some twisting that may in fact be ph related & also could be the contributing factor of the general health of your clones

I would complete a soil runoff test to know the PH (which maybe acidic from your ferts that wernt ph corrected)ferts are almost always acidic

To rule out PH related issues complete a soil runoff PH test.......
with PH corrected water (6.5-6.8PH ) pour enough water in the pots so the water runs out the bottom of the pot ...collect & test the PH of this runoff water....