I am currently running a 10g sw
. Its a transition from my 55g while i build my 220 g setup. I am running it with a couple of pieces of cured live rock with crushed coral as substrate. I am using my old protein skimmer from my 55, basically for additional water movement, plus an additional powerhead. i do water changes about once a month. it is stocked with 2 clowns, thats all that survived the move into our new house. Both clowns are doing very well and the simple filtration setup seems to be working fine.
I will agree bigger is always easier....except when it comes to your wallet.