The good thing about Bladder Pond Snails is their cleaning abilities. I love to have them in all of my invert tanks because they are great scavengers. Any leftover food or dead carcass will quickly be eaten by these snails. Another thing that I love about pond snails is that they do not grow to a large size. The largest Pond Snail that I have ever seen was maybe a bit over 1/4" in size.