The video consists of a contest held in Hannover, Germany in 2011. The contest centers around aquascaping of aquariums. Every tank is the same size and no one is allowed to use Co2 or fertilizers of any kind. The contestants are not permitted to use any fish because it is believed to take away from the beauty of the aquascape. I would love to visit this contest one year to learn from the masters in he field of planted aquariums. I hope one day to have a few tanks as beautiful as some of theses.