need find cheap (or free) good filter medium for my 436 Gallon
 

Or instead of window screening, you can use green house shading.
Probably the same stuff but, in the UK at least, seems easier to obtain.
You can also get a variety of mesh sizes.

Lee Brouillet wrote:
Kathy's suggestion of window screen is probably the best for both mechanical
and bio.
Lee
"John" wrote in message
m...

I just build a my filter box 40''x42x 60''(with plywood,treated
lumber,simpson ties etc) for my 6000 Gallon pond, need a lot of medium
to fill the filter, my budget is very tight now, please advice on any
good CHEAP medium ( I believe I need both machanic & bio filter
medium). thanks in advance

--
Matt Helliwell
www.helliwell.me.uk
matt at helliwell dot me dot uk