Well that is my goal. This will be my first build. I have a 20L that was used as my sump for my 75G. I am in the process of tearing down the 75G and wanted to have something to keep some of my coral, two ocellaris, and a watchman goby in. Also a setup that is a little bit quieter, more aesthetic, easier to move and smaller. I settled on the idea of building my 20L into an all on one setup. I also have a JBJ 28G Nanocube LED setup and there is very little room to add coral/fish to. Here is my idea/price/equipment: (Please provide any and all feedback) (A lot of this stuff I have already)

20L: FREE
Thermometer: FREE
2 maxi-jets for return pumps: FREE
Return pump hose system: $15-20
Acrylic: $30 dollars/ I have some but will need some more
Sand: FREE
Microalgae: FREE
Rock:FREE
LED system: Either 24/36 LEDs http://www.aquastyleonline.com/categ...able-LED-Kits/ : $100-125

Sump:
Deep sand bed/Microalgae/PolyFloss (rock rubble?) (need to figure out light source for sump) (I would like to run the sump light opposite of main display light. I have been told that helps with PH)

Here is the the very basic draw up:


More questions:
I do not plan on running a Protein Skimmer as I will be doing 2-5G water changes every week. Will that be OK?
I like the look of a bare bottom tank. Anyone have any experience with nano sized bare bottom? I am assuming the deep sand bed in the sump will help with filtration.
I am thinking of building an ATO for the system. still need to do some reading on this one.
Has anyone removed a rim from a smaller tank?