Aquarium Gravel Cleaner Vacuum Handheld Siphon Pump with Long Filter Nozzle All-in-one Water Changer Aquarium Cleaning Accessories Gravel Vacuum Cleaner Usage 1. As shown in the picture, insert the water inlet into the aquarium and place the outlet opening in the bucket to tap the bulb 3-4 times. Using the siphon principle, the water can flow out automatically. Note: the water outlet must be lower than the water inlet when in use. 2. Once the water has flowed out, place the water inlet pipe in the place where there is a lot of dirt. Stirring the gravel can absorb the dirt with the water. Note: small fine sand particles can be sucked out during use. 3. If you want to reuse the used water in the aquarium, place a filter at the front end of the drain hose and reuse the clean water. Package includes 1 x Aquarium Gravel Cleaner Material: Plastic Color: as picture Total length: 143 cm/ 60