These Max-E-Therm Heater uses a specially made Cupra Nickel exchanger, and are safe for use within Koi ponds. NOTE: Typical Sta-Rite pool heaters use a copper exchanger that is not safe for fish. So this model is more expensive than pool heaters, but is actually safe for use in a fish pond. In addition, this unique design prevents rusted burners, which are common in some heaters.
Easy to install -- simply hook up your gas line and plug it in!
Digital readout of pond temperature and set temperature
2" union inlet fitting at top, and 2" union outlet fitting at bottom
Energy efficient, with an 84% efficient rating
Comes Natural Gas Ready. Conversion kits are available to convert to propane.