I need some advice on how to heat my 2 indoor pond one is 1200g. and the other one is 1400g. they won't need to be heated for a couple more months though
To keep a 300gal outdoor shallow pond at an ambient temperature of 15-18 degrees Celcius, I use 1800 watts. but if your pond is in the inside you wont suffer from such severe temp. fluctuations, this is to give you an idea. The guys at Clepco could help you, they sell very powerfull submersible heaters, here is the link: http://www.clepco.com