Hello.
To refresh the fish.
What do you think of a pipe put in the ground in the shade in serpentine for about 200 feet.
I could run this water where I feed the fish.
I wonder if that make sense.
A+
Not to throw water on your plans, but I doubt it will help at all.
Here's some info for you.
In 65°F water, 35# of ice will drop 100 gallons of water by 7 degrees. Now run the calcs on how many gallons of water is in your pond & what temp, then look at what is the water temp and volume of water that will be in the serpentine pipe in the shade?
That's why I say it won't help at all.