Actually, shipping shouldn't be a problem if one condition is met-- that the livestock you sell and ship is tank-raised. Let me know if you would ever consider sale or trade of some of your captive-raised stuff...
I've maintained temps in the lower 50's in some of my tanks, and I can say (at least after the first couple of seconds, anyway) that working in the cool water actually feels pretty good. Invigorating perhaps..?Alright, but aren't you FREEZING snorkeling in that temperature? And don't your little hands get soooo cold placing rocks and cleaning?? I'm thinking that is about 60 degrees Fahrenheit and that is chilly!