that medium looks like poop. are you a newbie? so am i. and i have been in this 3 years, come march. go to potting soil. water em in thoughly. then no more till the moisture meter says so. simplicity is the best way to avoid alot of problems. dont pay too much attention, to seasoned people, with all their nutes ans stuff. they have evolved, and learned thru time, what works and dosent. use half the nutes whatever u use say to use. keep the roots warm, meaning do not place directly on a cold floor. i use 2" thermal board. never foliar spray them, with lights on em. it hurts! also, when i transplant, i add at one tsp, per gallon, of epsom salts. this is magnesium. without it, the plant cant use anything! ph usually is not critical with soil. however, i adjust mine to 6.6-6.8. with 6.3-6.9 being max on either side. i find sometimes, too much attention, is not good. they like to be left alone..