Hi..

My plan is for a few Shubunkin (2-4 max) and a lot of
plants...I quite like the idea of creating some sort of
veggie filter at the top and am very fond of eating
watercress so that will probably be the chosen crop...

Great! Tell us more about your pond. Do you plan to create a
summer pond (like mine) or a pond to overwinter your fish?

What I would like to know is if I need to add anything
else in terms of filtration....we can easily hide an
external system and it is close to a power outlet...

Is a veggie filter a plant root filter? Those filters do
work fine! Personally I would check out that kind of filter
Koi-lo introduced!

First of many questions, on this project, I'm sure

:-)

--
cu
Marco