We have a few things we are thinking about.
Deeper- obviously our frostline can get pretty low and 4 1/2ft won’t cut it.
More heaters- the one was still working after getting Incase’s in ice numerous times. But it’s the fact that it’s getting encased in ice period that’s a problem.
I think I made a huge mistake placing the bubblers on the bottom of the pond. I think it may have super cooled the water just aiding in the problem. So a bubbler right under the ware surface next time.
A top built from wood that can withstand snow cover. I might place wood beams in the ground to anchor the top frame to so wind won’t have a chance to move it. We both wanted a greenhouse for it, but with our high winds we haven’t found anything that would be able to withstand them. So building something short and strong I think will be our only option for a cover.
I want to use vinyl for windows. It’s much thicker then plastic. Or maybe acrylic now that I think about it.
Even with all that I’m not sure I’m 100% positive another winter like this wouldn’t be fatal. Building an indoor pond in one of our sheds is another option we are exploring. It might be a safer option. I hate moving koi around when they start getting big, but it will be worth it if it’s our only way to protect them.
