Arky —years ago I bought a submersible pump from sears—stands about 8 inches high with garden hose attachment on base. 110 volt. Cost about $90.
I have trouble sometimes with water freezing right where my 1 1/4 “ line comes outta the Lake. Water levels fluctuate because Ontario Power Company will draw the Lake down over winter exposing pipe.

I attach garden hose to pump—turn it on so it sprays water on frozen line. Frozen line will unthaw—sometimes a few minutes sometimes hours.
First few years I lived on the Lake here I was fighting frozen water every winter. I always keep enough bottled water around to make a pot of coffee and can always cut a hole in the ice to get a 5 gallon pail to flush toilet

That pump only pumps around 10 gallons a minute maybe less but I would think it would stir things around enough to keep a 1200 gallon tank mostly frost free

Last edited by kkahmann; 02/19/21.