Chemical-free snail trap for aquariums.Key Features:• 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.