I'm doing 100% perlite trees, 20 gallon brutes, dtw. Used to do mpb's, like dizzle, but hempy's, perlite and top feed are working way good for me. I top feed 3x per day, using a 100 gallon res, (not in the bud room), for 12 trees. This lasts for 3 days. I can remote view my meters for room...