What does this look like to you?

It needs more room to grow. Would also maintain your ph levels. They could be changing swiftly. Leave clawing is too much nitrogen likely, spots are some look like water on the leaf and light burned it. Other looks like maybe calmag but I would put my money on ph off in tiny soil space. Good luck and happy growing 🌲🌲🌲👊

To me they are screaming "please put me in bigger pots!!" The issues you are identifying are most probably occurring due to being root bound in tiny cups and also suffering from too much food. After looking at your diary, these are baby plants and need baby feeding schedules. Giving them a strong mix of 7 different types of nutrients and combined with being in those tiny cups is akin to plant torture. The tiny amount of coir they are in would be overloaded with left over mineral salts from the nutrients and this is causing the leaves/plant to protest. Also, being in such tiny cups, their ability to grow is being heavily restricted. Plants really shouldn't be in cups that small any longer than a week. I am positive that if you replant them ASAP, they will be much, much happier. At this stage, they are being severely restricted in their ability to grow. Also, feeding them should be gentle affair, quarter strength is plenty strong enough for baby plants. Once you replant them, cut back on the huge mix of nutrients you are giving them and just rely on one or two decent "grow" nutrients for now, they should contain everything a plant needs for healthy vegetative growth and leave the bloom nutrients/stimulators/boosters for when they are actually blooming. Hope this helps,... Organoman. Sorry for the harsh words, but those plants really are being tortured in those small cups. ...... Organoman. (universal protector of baby cannabis plants!)