I collect the rain off a metal roof in a 55 gallon food grade plastic drum. the ph is 7 with 60 ppm avg. i have been using AN ph perfect, sensie 2 part, bud candy, then final flush . i would like to try my rain water and a organic type of nute grow, i mean like with poop teas and such?...can this be done with 5 gallon dwc buckets?