2.5 Gallon AIO w/ 18 watt Current USA Fixture
 

Just getting rolling but here are a few pics...

http://i103.photobucket.com/albums/m...n/IMG_0829.jpg

http://i103.photobucket.com/albums/m...n/IMG_0830.jpg

http://i103.photobucket.com/albums/m...n/IMG_0831.jpg

http://i103.photobucket.com/albums/m...n/IMG_0832.jpg

aww its so cute and small. what are you plannign on putting in this tank?

As you can see I have a few temp issues right now mostly because of the house temp but I'm just trying to figure worst case right now. But when I have a fan on or the ac on it seems to be ok.

Mostly just zoas maybe some frogspawn some candycane, clove polyps, yellow polyps. Maybe a small clown goby not totally sure yet just trying to get everything sorted with heat and evap so I can make sure everything stays stable

You could try and work in a nano chiller

or just throw a fan on it and dial in a auto top off, you can even diy a drip one for really cheap (same principles as the diy kalkwasser drip).
did you glue some rock to the back of your tank there?

Yeah to direct the flow from the outlet up it was tossing all the sand around. Yeah I'm thinking I'll do an ATO and wire in some computer fans. That chiller is cool but it'll be hanging out the back of my tank almost the same width as my display lil to big still... not that a fan will work better but it is cheaper.. and I guess it might look a bit better

Ideally you would drill the back of the tank for that chiller, that way you wouldn't even know it's there unless you enjoy looking behind the tank. Plus it's only $50, you'll spend more on an ATO and different fans and adapters trying to find a quiet combination.

gotta disagree with you.
a diy ato like I mentioned would cost about 5$.
a fan for a tank that small would not be over 15$ from any computer hardware store...

I guess it depends on how you define ATO, I wouldn't consider trying to dial in a drip rate to top off a 2.5 gallon tank. I wouldn't even consider that automatic.