1. I'd go with root gel on all.. I get 100% success.

2. You should have a weak (300-400 ppm or 1/4 strength) flower fertilizer solution in the machine.

3. Keep the water in the cloner right around 75 deg. Best way to do this is use a seedling heat mat and controller. Put the cloner on the mat and the temp sensor on the outside below the water line (usually a suction cup holds it in place).

As far as prepping the clones... I cut them at a 45 deg. angle, let them sit in the gel for 20-30 seconds and then put them in the machine. Normally a couple of weeks for decent roots.

Good luck.

Farmer Rich