hey stony how large are your mums and have they always been in coco? drip to waste is the way to go. i use the rubbermaid brute 32 galls for rezs and have a couple of bubble bars that come on with the pump to mix up my nutes a lil. i only water once a day and not too much runoff. i use h3ads formula with gh nutes and never flush until the final 2 weeks or so. what size containers you got these girls in? i like to have at least 3 or 4 drippers per girl to spread the love around. keep us updated i know you're gonna have em dialed.