[header] How to start a jellyfish tank [title] Look for a small to medium sized aquarium tank. [step] You can house your jellyfish in an aquarium tank that is clean and sterile. You may decide to have only one to three small jellyfish in a small tank that you can fit on your desk at work or at home. 
Or, you may go for a medium sized aquarium tank that can fit a larger number of jellyfish. Look for a tank that is circular in shape or tall and narrow.