Why are they always in circular or cylindrical tanks? Is this to create a different motion power heads cannot provide? Perhaps this circulation creates a different kind of current, keeping their bodies in the correct shape and motion, while making sure they get fed? Who knows?
jelly fish get stuck in the corners in a regular tank. they auctally get dents on them.. i had bought a blue jelly like they have in the coney island aquarium. and that is what happend.
my neighbor on my block is a marine biologist. she is in charged of the jelly tanks in coney island. she took me behind the sceens man you have to see what they have there.. truly amazing system and an enormus amount of money to set it up and run it