1. Fish waste suction collector/fish waste cleaner accessories: It can remove dirt in the fish tank, maintain water quality, and improve the ecological environment. Must be placed in water for use. Suitable for fish tanks of 80cm-100cm. 2. Working principle: Purify the water in the fish tank, store fish feces and impurities in the middle compartment, suck away the dirty water, and then return the clean water to the tank. 3. Easy to use: This filter accessory needs to be used with an air pump. Simply plug it into the air pump and into the bottom of the aquarium. Once the middle compartment is filled with fish poop, simply remove it and clean it before placing it back into the aquarium. Colour:As Shown Material:Plastic Package Contents: 1 set x filter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.