John,

I started with a similar sized pond back in 1998. I upgraded to a Biofalls
filter after experiencing the same problems you've described. It worked just
fine. I also installed a Biofalls filter on my newer 3,000 gallon pond. The
filter that Jan describes will work just fine. If you're not much of a do it
yourselfer then you may want to consider the Biofalls. Just Google "Biofalls
filter" and you'll get several dealers. You'll get by just fine with their
Mini filter. You'll still experience a period of green water in the spring
but this will clear. Throw a bunch of pennywort, mint or other stuff in it
to help with the filtering. I only had to clean the filter once a year, in
the spring. I did use a "pre-filter" on the supply side to cut down on the
amount of gunk sent to the filter. I did have to do weekly cleaning of that.

John

"John Arruda" wrote in message
news:GC9Bg.8516$ok5.5362@dukeread01...
I'm looking to replace my current Tetra pond filter on a 1000 gallon Koi
pond with something people are having good luck with....

The problem is my current filter needs to be cleaned at least once per
week. I have a fair amount of algae remnants which need to be hosed off of
the Prefilter pads once per week minimum. The filter itself also drains
slowly and can back up where the water level will slowly reach the top. My
pump may be a little strong for the filter and the filter is also only
rated at 1000 gal per hr max.
I'm looking for something low maintenance and of course clear water.

Any suggestions greatly appreciated....
John