The TERAPUMP BPA-Free XL Gravel Cleaner is a powerful and easy-to-use water pump that is perfect for keeping your aquarium clean and healthy. With a transfer rate of up to 7 liters per minute, this water pump can quickly empty 10 gallon tanks in just 7 minutes. The TERAPUMP BPA-Free XL Gravel Cleaner also features two different nozzles for filtering dirty water or rainwater. The shorter nozzle is ideal for water changes or drainage, while the longer nozzle is ideal for cleaning fish leftover food droppings and other debris from your aquarium. The TERAPUMP BPA-Free XL Gravel Cleaner is powered by a manual siphon action, making it easy to use even for beginners.