Description 2 pieces planaria trap with 3 holes, it can catch the planarians effectively, thus reducing the number of planarians in the aquarium. Properties 1. Made of high quality crystal glass, durable and reliable, no harm to your pets, crystal clear. Portable and lightweight, easy to clean. 2. High brightness, no water waves, easy to clean, not easy to grow bacteria. 3. Using the activity habits of planarians and leeches, the lower entrance is made to enhance the trapping effect. At the same time, the small hole makes it easy to get in, while difficult to pull out for the purpose of trapping. 4.3 hole design, convenient and practical, target planarians that can never get rid of, in order to keep a healthier living environment for shrimp and fish Tips: Do not feed crystal shrimp before catching them. If trapping planarians and leeches is best to turn off the lights planarians are nocturnal animals that like to eat in the dark. So you'd better turn off the light-trapping effect! Note: Please allow a little error about the size due to manual measurement. Specification: Material: glass Color: Transparent Size: Approx. 13 2.2cm Package includes: 2 Planaria trap (three holes).Wide application: Can be used in the fresh and brine tank, planted tank and shrimp thank, suitable for cherry shrimp, crystal red shrimp and dwarf shrimp. Precise detection: crystal worm traps made of white glass, crystal clear! The mouth is smaller than 1 mm and does not accidentally injure the young shrimp. The trap tube is not straight and the trapped worms lose the chance to escape. Usage: put bait like raw pork liver, dead fish, shrimp, meat, etc., fill the water and place it on the bottom with holes. The next day, take out the trap, clean and wash the trip, and repeat the steps. (You need to practice a little first, but if you succeed it works great). Multi-hole design: Planaria traps are equipped with 3 holes, comfortable and practical to catch inseparable planarians whereby the planar can be effectively trapped in the tube to reduce the planar population in the tank. Material: Made of high quality crystals, high brightness, acid and alkali resistance, no corrosion, it will not damage the beauty of the shrimp tank, delicate, efficient and safe. Easy to clean, bacteria not easy to multiply, can be used in fresh water and salt water.