Check with other pond owners, garage sales, etc., for a used pond fountain or waterfall kit. Usually people start off with something cheap and then move up. Then the cheap item gets stuck in a box in their garage.
For a cheap filter, go to my blog and on the right side, scroll down, and there is a link to a DIY Pond FIlter that you can make for around $10.00. It's only for small ponds.. but one of the replies to my blog has a link to a larger DIY pond filter.
What size is your pond in gallons?
