- I'd like to heat my pond to create a hole in the ice during the winter to help a few goldfish survive. The fish are not expensive but I'm trying to save them. The pond is about 50 gallons, about 12 inches deep at the most. Pond is a commercial stiff liner that is kidney-shaped.
- I've seen the pond heaters use a lot of energy, 1500 watts or more.
- I have an aquarium heater and I might try that but those can be 1000 watts or more. But I'm concerned it will not survive a 100% duty cycle in mid winter.
- I'll be using 120vac to heat the pond. Glow plugs seem to all use 12vdc so that's not a great option but I can convert 120vac to 12vdc.
Is there a more efficient way to turn electricity into heat to just keep an open hole in the ice in the pond? I am familiar with basic electronics and make LED lights as a hobby.