"btinternet" wrote in message
...
im thinking of growing watercress as a vegi filter. I have a header pool
on
my main pond which is 10'x3' and 14" deep. I am thinking of growing
watercress in seed trays floating on the surface. What would you use as a
planting medium? I was thinking of mixing 2 parts gravel to 1 part clay
cat
litter. Is this a good idea? My main pond holds 3500 gallons and is home
to
11 koi and 4 goldfish.

To get the most out of your Veggie Filter you want bare roots. I mainly use
Water Hyacinth for my filter, but I do have some Iris as well. The iris are
planted in baskets of rock, but are there mostly for the look. The WH roots
dangling really do the main work. I also use watercress. It is a great
startup plant because it is cheap and easy to get. I have found the best
results for me with Watercress were when I just tossed the plants in. They
root in just a few days. Put them in running water like a falls or a stream,
and they will take over your yard.

--
BV.
www.iheartmypond.com