and can be mounted anywhere. Pumps 80 Liters/min or 110 Gal/min. $270 will get you the 110 liter /29 gallon model. Is that enough capacity? I would think you could eliminate the thermostat and add a second water temp sensor to the sealed up water pump housing. Run the pump at say 6 volts till the temperature hits the limit then a relay to kick it up to full 13.5 to maintain that temp. ?