Mark, I just noticed your post has been overlooked. You ask about veggie
filters.
Maybe my post in answer to fireball will help you.

Nedra in Missouri

"Mark Bannister" wrote in message
...
I have read SO much conflicting advice I thought I would ask for some
more. Our new pond is coming along slowly but it is time now to do all
the plumbing. Approx 700 gallons, 3' deep, concrete block. A veggie
filter runs along one side. Two water intakes pull water from a skimmer
and from the bottom of the pond. Water returns under the veggie filter
and midway down in the pond.
The questions a
What kind of filtration, if any, do I need before the pump?

Do I need any filtration after the pump but before the veggie filter? I
assume the veggie filter won't do much in winter.

Aeration; there won't be any fountains or falls so I assume I need to
add some air. Air pump? Venturi "suction" type? Or perhaps a second
filter would do the trick, like a Skippy Filter.

Mark B.