TYT,Welcome aboard ! Look into the GAST 0523 1/4 hp model for the cfm range Bill is referring to, it is a matter of switching 3 wires to go from low to high voltage and simple to do, Gast ships these high voltage,at a 12 ft depth depending on diffuser and line ID and length you would have approx 3.7-4.2 cfm available. Most pistons that I deal with either Brookwood or Thomas are available high or low voltage once you get into the dual piston models (4.4 cfm) which is a lot for your size pond they are however wired either high or low volt at the factory. The lower cfm models (1.5-2.5)single pistons are strictly low volt (110-115)If you wish to put a pump in an exsisting building and trench to the pond it is simple to calculate the friction line loss to come up with the size line and diffuser needed to get you the turnover you desire. The longest run (due to having no electricty )that we have trenched to date is 5000 ft.so power by the pond is not needed in most cases. The savings on 115 volt vs 220 volt when you are only using 3-5 amps low volt is very very little so keep your options open and continue your homework, As far as when to install keep in mind your current demand for DO is low but will only increase as times moves on so when ever is conveinent for you and the budget allows I would schedule it.If you cant find the specs on the Gast in question visit our site, Good luck Ted
