Run it long enough to keep an ice free area that's about 10% of the total pond surface. You might be able to get away with 5% but I'd err on the side of caution. No specific run time.

I am lazy, I let mine run 24/7,

The most important time to run them is at night into the early morning hours.


www.hoosierpondpros.com


http://www.pondboss.com/subscribe.asp?c=4
3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).