Sherb Biker and Watermelon Zkittlez elite clones

Mid 4th week! Gals are doing good since defoil on day 21. The flowers are coming out everywhere now and smell is getting noticeable. Since defoil I i can water one day later than before. I gave them 10ml pk5-8 deluted in 1l water for each plant this week. good news: I checked some leafs that seemed sus under a microscope and they are good. no Mites visible with 100-150xzoom. bad news: The cal-mag deficiency is slowly developing spots on the top leafs of the sherb biker. I most likely cannot change that the sherb biker will now get more and more spots and start looking a lil bit messy at some point..... but if im lucky giving them extra cal-mag every week and keeping the dli and ppfd at moderate numbers will slow it down enough to not have a negative impact on harvest quality and amount.