Many are understaffed, underfunded, and struggling to stay afloat. When I worked at one I had 17 tanks on 6 different systems, both fresh and saltwater, ranging from saltwater touch tanks, to Indo Pacific FO, to predators, to freshwater rays, electric eel, planted tanks and a coral tank. All were fed daily, and food needed to be prepared. Overtime was not permitted. I worked (illegally) off the clock an extra 5-10hours weekly, including nearly all major holidays. For 8 months I did daily water tests on 30+ systems, including ammonia, nitrite, pH, salinity, and weekly nitrate and calcium...and then had some tanks on top of it. Plus, things like a 30% water change on a 100,000g + system requires some planning as well. I would expect that several home tanks beat them because there is no where near the excuse. But for sure there are people behind the scenes of those tanks working their butts off.