if u scrog, the screen needs to be higher up, about,1 ft above minimum. u can buy charcoal at a pet shop and build a charcoal filter easily with a empty cofee can or even a tube sock. id switch to fabric pots, ull get a better germination rate and bottom feed to avoid mold,mildew bugs, and algea. just keep topping and some lst to keep the 5th element smaller or bend the plant over wile she is still small, ull get lots of tops.. id personally switch nutes to general hydroponics maxi grow n bloom, cheap but the best ive ever used..