I would like to purchase a Gold Mystery Snail (or two) for one of my tanks. When purchasing a snail, do you look for anything in particular? Should I quarantine the snail before putting him in the tank, and if so, for how long? What would I be looking for while the snail is in quarantine? This snail will be placed in a 9 gallon tank with a female Betta. Thanks for any info in advance!