Now, here is some other advice for you. If you make your own filter it'll be cheaper. This is what many people do. For example trickle tower is one that many pond people use to keep the water crystal clear (the trickle tower is not used alone but with another filteration system with it). It's sort of a smaller version of what a stream does with the water in the mountains, the water trickles down through lava rock, which is placed in a large cylinder, and goes back into the pond.
Here is a link with several articles on different types of filters, how to make your own fitlers, and it is to help you decide what is best for you.
http://koivet.com/html/articles/articles_c...ntro=FiltrationScott
http://www.81x.com/pond/mypondBTW, for those wondering I used to post on this board when it was an ezboard. I didn't register and didn't register and then my computer freaked and I couldn't access email and other saved stuff, LOL after a few months I finally got everything in order (3 days ago). Computer works, for now. I was RockHeaded.