Interesting I will have to do some reading. cheers.
Acorus variegatus - more a bog/marginal plant but does ok in cold water for a few months. I have a big clump floating, with leaves out of water, in a trough about 30cm deep outside. Can send you a little bit if you like? Otherwise go to a nursery and get a large one and divide it up. I use to get about 20-30 divisions from each plant then flick them off on tm