Can This Pond Be Winterized to Keep Fish Alive?

[poconojoe]

Any chance of digging another (deeper) pond?
Dig a hole, lay in a liner.

Keep the concrete pond for the warmer seasons or maybe just grow plants in it.
Or somehow turn it into a bog or some other kind of filter?

 

[BSquared18]

I hope you're kidding....

 

[poconojoe]

I hope you're kidding....

Not kidding.
You can dig a deeper pond and put a liner in it. It's not that hard.
It doesn't even need to be that big if you only keep goldfish.

 

[Lisak1]

I think how hard it is depends on lots of factors. For me that would involve moving literal tons of rocks, some that were machine set. A small pond with smaller rocks that can be moved by hand - not so hard.

And @poconojoe is right - even one are dug down 24 inches would allow you to overwinter goldfish. But I also know people who do what you do and replace with inexpensive feeders every year and are happy doing so!