Use the matt side of foil NOT the shiny side!...Better still use matt White emulsion...NOT brilliant white...better STILL ...MYLAR! [is inexpensive]....You have a similar set up to me...except I'm going hydro with my cuttings come the flower time!...so keep this thread alive and I will post my pics and journal anon.Download 'THE CANNABIS GROW BIBLE' by Greg Green! It's free on torrent sites and is a very good and easy manual for your needs! If you must feed them...Use a super dilute concentration at first and only feed half of them to see if they can handle it ..if they can't you will be sorry if all the plants die !