Olivias Cloning Gel + Rapid Rooter root cubes + humidity dome = ???????? i'm not sure yet, but this is how i plan on doing my next clones, i've used root cubes for starting seeds in the past, there alot like rock wool there just made out of treebark.. and there more of a spunge substance... there suposto be pretty good for cloneing, work great for seed starting and have benifishial microbes that live in them, to help things along, i havent ever used rock wool, but i've always heard about ph probs with it, so back in the day i went the root cube rout, just some food for thought