Originally Posted by Fintastixrods
Re:HSB I thought I read here in my previous searches that they are not cold hardy below 37 degrees or so, and sudden temp swings kill them as well. May be mistaken for other fish! I'd love to end up with some line breakers to keep the kids on thier toes!

Are you talking about water temp or air temp? Water temp in ponds that aren't super cooled by an improper aeration system installation/operation shouldn't get cooler than 39°F. As long as there are sufficient O2 levels, HSB will survive under the ice.