Here are a couple of threads.


http://www.pondboss.com/forums/ubbthreads.php?ubb=showflat&Number=22273&fpart=1

http://www.pondboss.com/forums/ubbthread...=true#Post67598

But I would caution anyone doing this over winter to first check on the effects of low O2 under the ice. With more fish in less water and ice over the chance of winter kill is increased.