Hi, my 20L has been up and running for almost three months now with 20lbs of LR, LS, and Emperor 280 (Temporary until I finish building my sump) Current stock list is only: (1) Ocellaris Clown (1) Four-stripe Damsel I would like to soon add: (2) Firefish Goby (5) Dwarf Cerith Snails (3) Turbo or Nassarius Snails (5) Blue Leg Hermit Crabs