I have an Aquabead filter. So far I am very happy with it. Works
best if you have the waste line hooked up to the sewer or some other
place where you can dump 100 gallons of water at a flow rate 3-5 times
greater than a full-on garden hose. The air agitator is a must on any
brand that you get. As with any filter I agree that you should always
buy a filter with a much higher rating than you need. I can clean my
filter in only 5 minutes with no fuss or mess. Takes another 15
minutes to add the 100 gallons used in the cleaning process back into
the pond and to clean the leaf traps.

Cheers
Dave