Species from the Lobelia genus
I've seen Lobelia Cardinalis used a lot. I have a bunch of them in my tank now. I've found Lobelia dortmanna discussed on this forum. What about other species? Specifically, does Lobelia erinus (crystal palace) have a submerged form? You can get these seeds at the hardware store. The only mention of Lobelia erinus I found on the forum was growing emersed in a HOB filter.