Jelly tanks are a bit of a new fad, so there are actually commercial options available, but you can DIY a suitable tank with a little research and elbow grease. Essentially, there are two types of jelly tank; Cylindrical with air driven circulation, and what's called a Kreisel tank. German word for circle. Flat front and back, but the tank is circular. Water flows around the edge of the tank, keeping jellies in the center away from the filter. Do a google search, and you'll see what I mean.
Someone stop me! Please! But... not just yet...
55 Gal Tropical FW
55 Gal Mixed Reef