Wow, sounds like a bunch of fun! I'm not too familiar with this... How hazardous do you consider it?
Oh yeah, almost forgot to mention.... Had a close call with the black tips the other day. We were pumping premixed salt into their sump to compensate for the amount they splash out during feeding, and they started going nuts. One almost jumped out, but the angled acrylic barely kept it in. They were even swimming around much faster than you saw when they were feeding. I guess the heater in the premixed saltwater vat was putting out stray voltage. It was barely enough to feel in the cuts on my hands, but the sharks sure didn't appreciate it. I don't know how we would have gotten him back in the tank if he would have made it out. Kinda hard to grab a 3+ foot shark with your hands, especially with those teeth.