I always figured people didn't keep jellyfish because it wasn't popular for whatever reason, not because of technological limitations; that's quite interesting. Jellyfish are more problematic than their chill demeanor suggests.
That is overkill. Three things suck in water in a saltwater tank: filtration pumps, circulation pumps, and protein skimmers. A strong current would just be mean in a jellyfish tank, so the circulation pumps are out. The remaining two are needed to remove waste and add oxygen. The best solution for this would be a sump. Basically the tank is a allowed to overflow into another tank hidden below. This 2nd tank holds filtration media, the skimmer, and a pump to run the water backup. See the link below for a diagram. If you make the overflow lip long and screened, and you don't refill the tank too quickly, the suction would be minimal and any jellyfish would be safe. In other words, this article is a giant load of Bull Shit.
I thought your comment was good up until the last sentence. Just because there's (arguably) a better way to do it doesn't mean the article is bullshit.
