Clonex cloning gel. I used to used Olivia's but didn't have that much success with it. As soon as I switched to the Clonex I noticed my clones rooted quicker and I had a higher survival rate. The Olivia's is like a gelatin and the Clones is like a gel. Also I like the fact that the Clonex is blue, much easier to see on the stem. I just recently got some of House and Garden's Root Excelurator samples and I am going to soak my medium in a solution of it to see if it can increase my survival rate and get clones to root quicker.