I see how the owner of that aquarium is explaining how this is not something that people should attempt as it was not , well i will just leave it to his own words:
"I don't believe that a single one of the Crew would ever recommend stocking an aquarium in this manner, and I'm virtually certain that none of our readers would attempt such a system. It is our hope that no one interpreted the piece as a tacit approval of the featured system. Hopefully, anyone who found the aquarium featured in the piece offensive or contrary to their sensibilities will continue to dedicate themselves to spreading the WWM philosophy of conscientious husbandry to other hobbyists, for the benefit of the animals that we all cherish. Thank you so much for your feedback. We welcome interaction from our fellow hobbyists! Regards, Scott F."