[tommyp]

I would do a 20L They are so sweet. I have a 5.5 and it has some frags in it but I am hesitant to put alot of corals in it. Not because it can't be done just that I don't want to be stressed out keeping parameters in check in such a small tank. I do 1 gallon a week water changes and no skimming.

I use it as a quarantine tank for small fish. I love clown gobies as well as all sorts of small fishes. Next fish are going to be neon gobies..back on track

I have a 20L that I have been thinking about setting up. I am going to set it up with a single 55 watt 50/50pc and dedicate it as a mushroom/softy low light tank. It is cool because it is shallow so you can get away with less light. I don't know that I would go sps in a nano just because of space, hardiness, and upkeep issues.

Not that it should stop you from going sps i just know i wouldn't be on top of it enough to make it work

I would set it up with a refugium.
If you are into diy you can buy some cheap diamond bit glass drills from harbor freight and drill the tank for an overflow. Possibly to a ten gallon sump for a small skimmer. I would use a modified lee's or coralife. If you had the money a bakpak or remora. and then half for a fuge.

I hate to send you to nano-reef but they are on the cutting edge of nanoness. lots of good ideas over there.

but I say go 20L or even a cool 30 cube or even a 16 bow aga thats a cool one as well and run a single halide. on second thought you might want some height for sps how about a 15 tall? too many options

Have fun!

Tom