I've been giving a lot of thought into starting a jellyfish tank. I'm thinking it should be 35-55 gallons. I want round or hexagon. I know they require low flow so they don't get sucked into filters. I saw a 35 and a 55 hexagon overflow built into the back, online $500-$672 I would like to add color changing LED's. Anyone have experience with jellyfish? Any thoughts or advise are appreciated.