Inexpensive Pond Filter

There is a great Pond Filter called the Hydro Pond. It is based on the
design of sponge filters and works in ponds up to 1500 gallons. Prices
start at $17.99.

· Maintains the biological filtration when main filter is changed or
cleaned.
· Prevents debris such as dead fish and plant material from clogging
the intake by distributing the suction evenly down the length of the
sponge.
· Prevents small or baby fish from being suctioned into the main
filter or water pump.
· Can be used as a temporary or permanent filter in ponds.
· Traps larger waste particles, mechanically cleaning the water.
· Includes adapters for use with various water pump intakes.
· Can be used in vertical or horizontal position.
· Easy to clean. Just rinse and squeeze.
· Fits most water pumps and filters.

http://americanaquariumproducts.com/...ondfilter.html