my Zen Water Garden and Koi Pond

[Reef Pilot]

I never change my water either. Usually get enough turn over with all the rain we get here, esp in the winter. I turn on my UV to keep the water clear from algae in the summer.

We have racoons and herons here. But have a little electric fence wire that I have a timer on overnight, and keeps the racoons out. Actually, don't even turn it on most of the time now (not at all in the winter), as I think the racoons know what that wire is, and stay away.

The heron has come and landed a few times, but probably doesn't like that wire around the pond rim, either, and has never tried to get into the pond.

So I have never lost any fish yet to predators,... or that I know of. And of course here in Vancouver don't have to worry about freezing.