Bonnie wrote:

Tomato plants in veggie filter grew well early
on, then were shadowed by the water celery and
disappeared. Today I was thinning the plants
and found one red tomato.
conclusion - tomatoes grow much better
in my soil than in my veggie filter.

You need to tie up the vines so they don't hang in the water. Tomatoes
grow very well in a hydroponic setup.