I am going to buy some battery operated pumps for my aquarium. Do you think they would create enough movement to keep water from freezing. My temps drop tio about 10 degrees at night.
http://www.petsmart.com/product/ind...-C881-DE11-B712-001422107090&mr:referralID=NA
http://www.petsmart.com/product/ind...-C881-DE11-B712-001422107090&mr:referralID=NA