imo think rockwell are too slow for seeds and i just dont like its preformance. use the peat disks, or even use the organic plugs for seeds after the paper towel germantion, but you need to clean as much of the peat carefuly for hydro, for clipings i use a clone areo box very fast 7 to 10 days and tons of roots . or the organic plugs they take 2 weeks but the whole system plugs tray and dome ,clone dip are only about 25 to 30 bucks.and they are clean and ready for the little coco rocks witch imo work the very best. personaly i hate rockwell way too slow...