Yes mate my water bill is high lol, couldnt work out why for a long time then figured its the ro machine hahaha its olny cause im hand watering and run to waste is not the best way to go. You use far more nutes and water with this method so when i go back to hydro my water bill will be more acceptable lol and ill save some dosh on the nutes as well. Most magnectic ballsts can use MH/HPS but i have an old one which is over 10years old which doesnt so check, it'll say what it runs on the ballast mate. MH is the way to go for veg and the first week or so with flower then swap to HPS. Now ive gotta go haha cant be arsed but my gals are calling.