Floating plants

Hi folks

I'd be interested in hearing from people who have tried using plants at
floating where they would normally be regarded at substrate plants. I
recently bought some Crypt Lingua & put some in the substrate (all now
dead) and one small one floated. The floater has put out several shoots
& has produced several new plants.
Keith Tomlin
tomlin at zippy_spods.dcs.kcl.ac.uk