sounds like spider mites..lollipops ur plant. take and strip all side branches and fan leaves off the bottom main stem for like 8 in above the soil. throw those leaves the F out. mites like the lowers at the beginning of the outbreak. sounds like thats wut u caught, and even not lollipopping will help the plant ditch the lower popcorn material, iimprove air circulation. dont do anything radical because of the mites, use the lollipop, and start a regiment of neem for a couple weeks. if ur not past week 4 of 12 12. use the neem once a week as a foliar, and during the inbetween times spray water and dish soap mixture and clean and wipe off ur new shiney leaves. do this without ur lights on for obvious reasons. this is wut i would reccommend. just dont do anything jurastic yet if u believe its mites, wut ive reccommended can only help either way