If kept in a square or rectangle tank, jellyfish will inevitably become stuck in the corners and die. To house jellyfish, they need to be kept in round/cylindrical kreisal tank. By definition, a kreisel tank is circular, which helps the water to constantly flow in a cycle. Even the bottom of the tank is curved so that there are no obstacles or changes in the flow of the current. With its unique inlet and drain, the filtration system uses a special screen to prevent the jellyfish from getting sucked in and liquefied. Separate inlet and outlet chambers assist this operation helping the jellyfish to stay away from the sides of the tank. Combined, both the filter and tank design create an equilibrium in water pressure so the jellyfish don’t get stuck in one place but rather swim freely.

I want one.