Hi Arthur

Thats a fine looking machine. Lots of blades makes lots of torque. And 40psi is proof that it works.

Its interresting to find out about using air to stop the pond freezing. I live in the tropics and have the opposite problem, water getting to hot. I have a pond with gold fish and the mid day sun heats the water to the point that the fish die. So I use a small pump to spray the water into the air to help cool it.

Thanks for the pictures.

Glenn