Need More Snails, But What Kind?

[Samw]

Trochus are my favorite for their speed and hardiness. They seem to outlast the other snails in my tank. I haven't had to replace any of them.

Cerith are my favorite for below the sandbed cleaning. They don't seem to die. I haven't had to replace any of them.

Money and Ringged cowries are also good for outlasting other snails. The bonus is that they look great too. I haven't had to replaced any of them.

I've bought dozens and dozens of Astreas and Margaritas and kept replacing them every couple of months but I've stopped. There are maybe 2 Astreas left and 0 Margaritas in my tank now.