On 12 Oct 2004 21:53:20 -0700, (Rob) wrote:
What is a dyi filter?

ITYM, DIY?
Do It Yourself?
A filter built for a specific pond by the ponder, based on principles
of removing solid foreign matter from the circulating water, whilst
providing a biological cycle to remove toxic waste byproducts,
especially ammonia and its daughter products.
"Pedants R us"

--
Crashj