My water lettuce and water hyacinth kept ahead of my fish.
So much so that I got tired of hauling it all out in the fall and am going to
try not to have any this year.
If you find the fish nibbling at them too much you can stick some in a
container, give them some food, let them rest and stick them back in the pond.
Some folks have a set in the pond and a set recovering.
k30a and the water gardening labradors
see the labradors at
K30A and friends' pond information page
I don't thing they need to have there roots in soil. Here in The Rio
Grand Valley of Texas they completely cover the Rio Grande and every
other body of water they land in, no matter how deep. They use boats
with special harvesting devises to clean them away. They are considered
such pests that it is illegal to sell them. mf