1 - Purple and 1 -Blue Mystery Snails I purchased these snails to keep algae under control and as a tank mate for my Samurai Betta but they're laying and hatching eggs before I've even introduced my betta as I read I should wait several weeks before introducing my betta to the tank. Not looking for a trade unless you suggest a good tank maye for my betta that will help keep algae under control. I'll have several baby snails to offer up once they've grown some if interested.