my veggie filter has no planting medium with water running thru it. either the
plants are in containers in dirt and just the bottom touches the surface or the roots
are right down into the water. Ingrid


Veggie filter is running water through the plant's roots and planting media.
The plants take up the nutrients and the media is a place for benefical
bacteria to hang out.
It can be as simple as floating water hyacinths in a stock tank filter, which
is what I do.