With 21 snakes doing a float on each one would be a pricy thing for me.. (it's about $20.. maybe they would give me a deal though with 21 snakes?)

I keep an eye on everyone.. I just got my scale and I plan on weighing everyone monthly to keep track make sure everyone is growing normally. As long as everyone eats sheds poops and generally acts normal, I don't worry about them. I quarantine for three months too..