Get it in medium asap,and give a low feed.don't panic about the tops so much,you will get better the more you do,in future soak the cubes in aloe Vera,or something like superthrive,this will help with rooting,I use aloe Vera with all my clones now,I use it has a rooting compound and has a cube dip,they love the stuff .Just strip one leaf of the slime,and stir into about a litre of water, but mist with just water,that has been left to stand for a few days to let the chlorine evaporate, and you will will do fine