Jellyfish don’t float in the water column only by the pumping movements of their umbrella. Additionally they need a water movement. So called plankton kreisels are the best guarantee for a correct water movement. But in an already existing traditional aquarium such acrylic plankton kreisels are difficult to plant in. Therefore we added for the current production in normal concrete tanks a pipeline system in the tank’s bottom surface to pump the water from the bottom to the water surface and in distance to the vertical fronts we planted perforated acrylic panes for the water current outlet. Of course any whirls and suctions have to be avoided.
If you have a free standing circular tank for jellyfish and would like to avoid any installation in the water column, then the both different pipeline systems for the filtration and the water current have to be planted under a perforated ground plate. It sounds simple, but the technical tests to achieve correct flow required so many tests that we finally registered the patent for this aquarium system.