Pro Shrimp's comment: This is a great tool to catch snails up to 6mm. This snail catcher picks them up straight off the glass, no need to squish anymore, just roll it over the glass and all snails get collected.
To remove unwanted snails simply drag the snail catcher across the aquarium glass and guide the snails (max. size6mm) through the rollers and into the trap. The extendable telescopic handle (max: 31 cm) stops your hands getting wet.