Bill D., you can run them intermittently. Clear ice (with no snow) will allow the sunlight thru. With a new pond, and it's low biomass, you have less chance of winterkill than a eutrophic pond.

If you get snow, run it until the hole opens and the sun can get into the water.


www.hoosierpondpros.com

[Linked Image from lh6.ggpht.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).