Overall go with the Gast Rotary 0523 and the newer 0523 version is 1/4Hp old version 1/3hp. New version rotary at 1/4hp operates 5 hr per KW, 4hr/kw for 1/3hp. 3 to 5 hrs per day with a good 2-3 head diffuser is enough to get good compete daily pond circulation for your type of IN pond. My KW cost is $0.12. The 0523 is easier and quicker to rebuild than a linear pump.


aka Pond Doctor & Dr. Perca Read Pond Boss Magazine -
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