Sue wrote: >Luca, I've more or less given up on the "holy grail". After duckweed and >snails, R. macrandra is my next big nemesis <G>. See Sue, that's your problem. I can't grow duckweed or snails. Duckweed snails and R. macrandra are clearly incompatible ;-) <--- (joke alert) Karen Randall Aquatic Gardeners Association