- 2-in-1 Quick Water Change: Connect directly to your faucet and watch the water flow automatically out of the tank via the gravel pipe. The pressure of tap water allows for efficient suction of gravel and sand while simultaneously vacuuming dirt from the substrate. - Non-electric and Noiseless Operation: This fish vacuum gravel cleaner operates without electricity, ensuring minimal noise during use. It won’t disturb your aquatic life, and there's no need for a bucket. An integrated round filter prevents small fish and gravel from being accidentally siphoned. - Automatic Siphon Faucet Adapter: Simply attach the aquarium water changer to your faucet and activate the water flow. Fill and empty your aquarium effortlessly with just a turn of the tap and valve. Note: Water hose is not included; a compatible 12/16mm hose is needed for use. - Convenient and Easy to Use: Switch from gravel vacuuming to water changing seamlessly by turning a single valve. Designed for quick transitions, this product saves you time and energy in maintaining a clean aquarium. Usage Scenarios: 1. Routine Aquarium Maintenance: Regularly remove waste and debris while simultaneously changing water, ensuring a healthier environment for your fish and plants. 2. Emergency Cleaning: Quickly address sudden water quality issues by draining the tank and replacing water without complicated setups or additional equipment. 3. New Aquarium Setup: Easily clean and prepare your substrate alongside water changes, making it simple to set up a new aquarium efficiently.