When I read the headline, I was thinking, wow that'd be cool. I bet they are stocking the tank with coepepods and microfauna. I was a little surprised to see fish in there after clicking.
But, this has inspired me to possibly undertake a nano coepepod tank. Those little guys are actually more interesting than you might think. When I was setting up my latest tank, during the aging process, I purposely dosed the water with fertilizer trying to cause an algae spike. As a result, before putting any fish and inverts in there, the tank was jam packed with coepepods. I had as much fun watching their antics as I did with my fish.