In Southern California, almost all of the really good
LFS are down in Orange County - which is atleast an hour drive for me.

Even Marine Depot has a pickup window so local customers can save on shipping!
I've never returned anything I've bought from MD, so I do not know what their service is like. I really like how I can have my MD orders delivered the next day since I am local, but some of their pricing and extra fees for bulky, heavy and frozen items is a bit steep. For example, it is cheaper from me to buy salt and substrate from F&S in Rhinelander, Wisconsin than it is from MD in Los Angeles! Pricing on MD items can be a bit odd, like how they are charging $499 for the Digital Aquatics Reefkeeper Elite presale even though DA sells it for $490 on their site. All told however, MD's inventory is deeper/more dedicated to
SW/has more premium products than F&S.
Ooops. Sorry to stray off topic...
Carmie brings up a really good point about needing a chiller.
IMHO, a nano is supposed to be inexpensive and simple to setup and maintain, so when I see people adding anything beyond a
skimmer and an
ATO, I start to wonder if they should just have a bigger tank.
Not to be undermining, but after having a JBJ Nanocube DX up and running for 1.5 years, I would lean toward an open top tank with standard 24" length such as a
Finnex 30g M-Tank or a
CADlights tank with a nice 24"
T5 HO fixture with individual reflectors.
In lieu of standard dimensions, may I also suggest the sleek
Current-USA Solana tank, or Foster&Smiths (cheaper) 25g OEM version of the 34g Solana dubbed the
"EcoCube".
I know, I know...I'm not helping...