Here is a super easy DIY nano tank that can easily be made at an acrylic or glass shop. You would want at least a 13 watt bulb no matter how small the nano:

Hey SM - I am going to start building a turf scrubber and was wondering if I can run some building questions by you?
Since I do not have a sump, I will be building a bucket version with a return back into the main tank. What pump - in gph - would you suggest for the line in to the bucket? And what about the return? Because of the fact that the return pump is lower than the main tank, I would only assume the return pump would be more powerful than the pump in?
I just want to make sure the rate at which the return line pumps water back into the display tank doesn't leave the bucket empty.