I went to my LFS yesterday to purchase some floating plants for my 20g. Specifically I was looking for duckweed or water lettuce. Unfortunately, they did not have either plant and the lady helping me also said that it is pretty much impossible to grow water lettuce in an aquarium. Is this true? I've seen many tanks with water lettuce and I feel like she didn't really know what she was talking about.
I have the zoomed flora sun bulb in my aquarium and just wanted to know what you guys think.