ive started using them, but am unsure if i'm doing it properly...see page 5 of this thread of mine for reference https://www.rollitup.org/cfl-growing/51226-cfl-first-timer-check-out-5.htmli would definitely start using some nutrients
It really just looks like nute burn from the nutes you added last time. Next time make sure you dilute nutes in 1 gal of water, or whatever the directions call for, then apply....
Its mostly bottom leaves right?