I had an idea and wondered if anyone had tried this.

My pond is 1800 gal.

Pump pushed uphill through a UV filter then onto a garbage can filter with
lava rock.

Gravity feeds back to 3' x 4' x 8" pond that starts the waterfall and back
to the pond.

The idea is ---- Can I either wrap the pipes with eavestrough heater cable
or put the cable into the filter to enable the system to be left on all
winter? I thought of also laying some down the stream.

Thoughts???