just wondering have any of you guys used this system. what i read it says suitable for one to three plants. and takes twenty litres of water. a friend of mines says he grew one big plant in one and had 9 ounces off it. under a 400w hps is that possible as he said he only vegged the plant for four weeks then put it straight into flower. how do you think two of these systems under a 600w hps would do in a 1.2x1.2x2m tent with one plant in each.