To Pico or not to Pico

[TORX]

So now that things are slowing down on my main build and there are just a few tweaks left, I thought I would have fun with some of the extra parts I have left over. I have tons of glass and a 5 gal tank. I will also have some LED left over out of my build for a light. Question is, has anyone done a Pico tank here? Any successes?

 

[blaked]

I'm designing a small tank to be looped in my sump atm.
  Its gona b for blue pipe fish. I'm thinking on using compact
  Florence bulbs... having it sit on my sump.

 

[TORX]

Looking to actually do a tank that is around 4 gallons. No sump. Reading up about it as I wanted to build a nano in the future, this seems a little more interesting. Smallest one I have seen and supposedly sustained was a 1.7 gal pickle jar LoL.