Just an update here, I purchased the 1/3 hp Thomas pump for about $65 ( I purchased 2 ) and the pump is great. It is quiet and can push more air than my old Gast pump did on its best day. Sort of puts whitecaps on the pond. Only have to run it about 1/3 the time I did the Gast pump to get same results.
Only thing I need now is to have some real rain in upstate NY to fill the pond back up after the very very very very dry season we had this year.
