You are right about burning through the nutes! I currently go through 100 gallons @ ec 1.3 in 4 days and that is under 2 @ 1000w hps. I've got another room coming online soon. I feed 3 times daily in 5 gallon buckets and leach with water between refills of the reservoir, until my leachate reaches 300ppm. I use the KISS method of the Lucas formula. I do substitute 1/3 of my Maxibloom with Maxigrow, add some Epsom salts and Orca bennies. Total cost is about 25 dollars a week. Over half of that amount is for the bennies. I have explosive grow! I may switch to Jacks to save more money, until I start mixing my own (using a recipe), I'm not a chemist. I would like to brew my own bennies, for some real savings and start adding silica, kelp extract, fulvic and humic acid to my mix.