The club is looking forward to many new members! We need have a naming contest for our new babies. For now, BS #1 found the same hole as the last one, against the glass - yippee! BS #2 is settled about 10" away from BS #1 under the rock (no digging required) below my hammer corals. He is more difficult to see.
Cassette - My tank is a 125 gallon, I fully cover it with glass (cut plastic to fit around all the tubes in the back). Your 29 gallon should be large enough, depending on what else you have in it.
Make sure you post your entry for two names! This will keep everyone occupied until they get their own BS!