That IS the best nano tank I have ever seen! Back in the 80s when I got started the consensus was that 200l was the smallest you'd want to go. I had a 200l and 900l tank back then and I started a 40l to see if it could be done. Lo and behold it could. People called me nuts for doing it, but I did it. Had my bubble coral babies in there with a few button Cynaria. SPS was a no go, hell, we were just figuring out cal, alk and mag requirements for our tanks. I stuffed 4x18" T12's over the tank, 2 daylight bulbs and 2 Phillips Actinic O3 bulbs and away I went, lol.
Damn fine job!