XIANQI 1. Keep your aquarium clean The aquarium dropper can remove dirt and food residues from the bottom of the aquarium. It can be used as a means of adjusting water quality, for nitrifying bacteria and as a liquid fertilizer for water grasses. 2. 4 scales on the tube With 4 scales on the tube (10 ml / 15 ml / 20 ml / 30 ml). This aquarium water transfer tool is printed with a clear and precise scale that allows you to easily measure the liquid. 3. Easy to use The amount of water absorbed by the dropper can be adjusted by controlling the strength of gripping the dropper end. Please clean the product before use. 4. Widely used This pipette measuring dropper is also suitable for brine shrimp and red worms that are fed after food is thawed. Live feed or small particles of liquid feed are also suitable. 5. High quality Our aquarium water changer is made of non-toxic plastic and cannot harm your fish. Quantity delivered: 2 pieces Product color：green Product size: About 28.5cm