I use almost the same pump but in 115volt. I have used it for 3 years and run it all summer and have never had a single issue. The pond is 1100 feet away and I am running a double diffuser. Shop around but this is as good as it gets for the DIY systeam!
http://www.surpluscenter.com/sort.asp?UID=2009032609351664&catname=air&byKeyword=yes&search=gast

shoot'em in the lipps