AquaZen Snail CatcherAquaZen Snail Catcher Like the old lint rollers for clothing, we offer the amazing snail roller for aquariums. The AquaZen Snail Catcher is perfect for that active person that can't sit around and wait for the Sera Snail Trapper to do all the work. The handle extends for larger aquariums. Soft in case you hit any fish, just roll along any surface infected with pesky snails and they fall right into the little collecting bin.