I've recently been perusing the EZ-cloner website. They're now recommending 75-85° water 24/7 for their machines. With the addition of their product called Rez Clean weekly. I now run mine at 77°, and add an ounce of 3% H2O2 every 3 days. I have the 32 site low pro EZ-cloner. I'm quite sure rez clean is just H2O2. I get roots pretty quickly with the higher rez temp.