Rise of the Fogbender

hey there JKT , well based on my understanding often times the downward pointing curling is more due to root problems , looks like you might have some because you're not using a chelation agent. You really want to start using something to break down nutrients in your solution for example beneficial bacteria like hydroguard (BS, BBassiana ) or even humic acid (turns your water black!) or dilluted flushing agent. These will break down the problem roots (should be brownish instead of full white. You could always cut some roots off too : never more than 20%. I see some signs of N toxicity, with those "too dark" green leafs, plus the fact you're not using micro nutrients like cal mag explains the discoloration on the serraded edges of the leafs. You probalby should be aware of this because oyu need to add cal mag (also spray it on twice a week) and might need to switch up the feeding regimen heading into flower. Hope this helps ! 🚀