I have raised koi in a 2000 +gal. Ride pool for several yrs, but have since moved them to a large outdoor pond. Now, I would like to change over to S.A. Cichlids. Question is, how to efficiently and economically heat it. Suggestions?
Heating the room is probably the most effective way. Solor pool heater on your roof would work too just make a shut off bypass valve in winter. It'll work on sunny days but take warmth out at night.