so what do you guys think? i've got a 20L with a 2 1/2 inch maroon clown that spends most of it's time in the corner of the tank with the heater. this is my first clownfish so i was wondering about tankmates...i now maroons are one of the meanest clowns but i think it may leave some substrate dwellers alone? also do how do you think it would do with some shrimps? thanks for any help!