I'm looking for small brackish snails. Possibly brackish "pest" snails. My fiance has some figure 8 puffers and green spotted puffers. The pet store sold them to him as freshwater puffers, which he found out they are not. He is slowly converting their tank to a brackish tank. At first he was dropping in pond snails and small ramshorn snails for them to snack on. But now that the salinity of the tank is going up, these snails cannot survive in the tank. So I'm wondering if there are any small brackish snails we can put in there for them?