Little Big World of Aquarium Bigger aquariums (pt. 6 last)

Another set of bigger aquariums displayed at the exhibition Little Big World of Aquarium, organized by Upper Silesia Association of Aquarists on 00:21 biotope aquarium, imitating freshwater habitat of temperate climate zone. In this case Poland :) It is planted mostly with waterweed Elodea sp. , which occurs widely in Polish waters, and also with some aquatic mosses, collected in the wild. Aquarium is stocked with crayfish also occurring in Poland, however I don t know what species