Well I was planning on getting some Lamp. Ocellatus or Neolamp. Multies. But, the two fish stores by me cannot get either one of them in. So it's to Brevis or Brichardi, but I only have a 20 gallon tank. I bought 24 escargot shells and sand for the shell dwellers. If anyone knows someone in Illinois that breeds small Shellies, please reply here. Do you guys think the Brevis will live happily in a 20 gallon, planned on starting a colony. Any suggestions are appreciated!