The correct way to use it is to put the water pump into the water and start it, otherwise the water pump will not start. 【Multifunctional cleaner】 Fish tank cleaner water change + sand cleaner + water filter + water shower + water flow 5 in 1. It needs to be connected to another socket when working. change of water in the aquarium 【Quiet design】The frequency conversion core of this stone crusher is made of ceramic, which reduces the wear of the pump, remains silent during work and prolongs the service life. Aqua Glass Cleaner The Hmax is 118 inches and the maximum flow rate is 2000l/h - it also comes with 2 powerful suction cups. It is ideal for changing tank water, cleaning dirt and water flow. Suitable for large and small cars, turtles, fresh and salt water. Cleaning kit 【Safe and durable】 This siphon cleaner has 20W high power and 220V voltage. Keep your aquarium safe, change water quickly, clean fish food, dirt and droppings