have always just used 1 1/2 wool cubes, soaked in purified water with a little hygozyme a little cal mag, a splash of clonex, and a sprinkle of great white microrhize for 24 hour. dip quickly into clonex gel and into the dome. set on a heat mat set at 72 degree's and forget about them,maybe lifting the dome after a couple days for a second or two. Have nice bright thick fishbone root's after about 10 day's then go to solo' cup's. Then use gen. org. line of organic nute's at 'bout full strength and all is good. might loose one or two at the most,100% most alway's though. I have thought about cloner's but figure that if it's not broke,don't break it.Also don't want to use even the smallest amount of power on anything other than flowerin' and t-5's for mommy's