Jim,

I'm using a bio-falls filter, sized for ponds 4,000 gallons+. It serves dual
purposes by providing bio/mechanical filtration and as a water fall. It
doesn't provide enough surface area to meet the requirements for use as a
veggie filter.

JB


"Jim and Phyllis" wrote in message
...
Have fun with the rites of spring!

I was wondering how big your veggie filter is? The rule of thumb is
10% of the surface. We use water celery and hyacinth...lots of roots.
They provide good bacterial surface and mechanical filtration. We
have some iris in the top of an upflow barrel. It does not have loads
of root surface. Our mint was better, but still less than the
hyacinth and water celery (want some?).

Flow rate is pretty important for us. We have the flow down to be
slow enough to allow settling (about 45 minutes).

How fast doe yours go through your filter?

Jim