Catches unwanted snails, shrimps or crabs in the aquarium: chemical-free snail trap with variable height limit of the inlet. Easy to use: fill the snail trap with food, insert rods to the desired height, place the snail trap in the aquarium overnight. Two small rods for the variable height limit: to prevent fish from entering unintentionally. Also suitable for catching shrimps or crabs. Water flow: no oxygen problems for fish caught unintentionally. Package contents: 1 chemical-free snail trap, Lim Collect II. Size: 11.7 x 9 cm.