What I'd really be interested in are things that stay small -- I'd love to do a 20 gallon long riparium for my husband's office at work, but there isn't a whole lot of space to hang the light fixtures. Any suggestions?
That sounds like fun! I can suggest a few shorter-statured plants. Here are a few that come to mind...
- Bacopa monnieri
- various trellis raft plants
- Echinodorus cordifolius 'Tropica Marble Queen'
- Ruellia brittoniana 'Katie'
- various stem plants, such as Hygrophila, pruned to size