Hi Kathy,

You mentioned in an earlier post that you put Watercress in your waterfall
to act as a bio-filter -I have two places in mine where I think watercress
would be able to grow, could you tell me what you used to give the cress a
foothold so it didn't get washed away please, also does the cress have to be
able to stick its heads out of the water as the places I'm thinking of are
like tiny natural pools (they are deep so the cress would be totally
submerged).

Many thanks,
Jay