PondFather save your money and buy a water filter like one of these :-
http://www.vyair.com/scripts/prodView.asp?idproduct=67
The cartridges are cheaper and it will filter around 2-300,000 gallons US before you need change the three cartridges again , so its paid for itself many times over .
20" three stage filters housing complete with filters Suitable for pre filtration for Reverse Osmosis, Aquatics & Similar
About it
Will improve quality of water
5 micron particle filter (PP) Stage 1
Granular Activated Carbon filter (GAC) Stage 2
Block Carbon filter (CTO) Stage 3
Manufactured from heavy duty food grade plastic.
Fitted with air-bleed button
1/2" BSP threaded connections
delivered also with 1/2" hose tail connections
Optional fittings for 15mm pushfit connections
Technical Information
Stage 1 removes ,sand,dirt,iron & other particles Stage 2 removes Chlorine & dissolved organic contaminants. Stage 3 further removes contaminants from water. We stock large range of 20" filter elements Particle Filters 5 microns Granular Activated Carbon GAC Block Carbon Filters CTO Resin Filters
This product is made from heavy duty food grade plastic, casings. The filters are manufactured by a quality ISO 9001 company a member of the Quality Water Association of America
Dave