Hi..

The plan is that it will be an all year round pond so I
need to get deep enough so the fish have somewhere to go
if it gets real cold....I have little capacity indoors due
to 8 tanks of tropicals to overwinter the outdoor fish....

Understand.

A veggie filter is one where, if I understand correctly,
you pump the water into a reservoir packed with plants
that take out and feed on the crud....

Okay, thanks.

--
cu
Marco