Ideal for deep aquarium cleaning or quick maintenance Easily remove substrate residue without disturbing the bottom layer of gravel. Please pay attention to the use in the video and detail information page. Improper use can cause clogging. The automatic pump removes water and fills the aquarium with water. Adjust the height to suit your needs This environmentally friendly product supports aquatic life in a green way The device can be used in freshwater and saltwater aquariums, and depth water can reach about 70 cm. 2 in 1 design Thanks to its 2 in 1 design, it can be used as a vacuum cleaner and water change system for quick and easy cleaning without causing siphoning or annoying cleaning jobs Ideal for quick and efficient cleaning, it can reduce and simplify maintenance time. It can effectively remove waste and other harmful particles without disturbing the bottom layer of gravel. Take care of your aquarium and aquatic life in an environmentally friendly way, improve filter function and keep fish and plants in good condition. ul Used as a vacuum cleaner and water change system Remove waste and other harmful particles Do not disturb the gravel layer Designed for medium and large aquariums The Extended nozzles can be used for deeper aquariums Note: The vacuum cleaner is suitable for freshwater and saltwater aquariums with a water depth of approx. 200 mm. 71 cm The size of the aquarium gravel should not be less than 2 mm. Not suitable for cleaning sandy bottoms. Depending on the depth of the aquarium, you can add extension tubes or lengthen the nozzles. Before starting the pump, the pump must be placed below the minimum water line. If the pump impeller is stuck with debris, loosen the impeller nut counterclockwise and remove the cover, then clean the debris from the inside. It is recommended to replace up to 25% of the total aquarium water every 2-4 weeks. Tilt it to better clean the gravel, change the water and remove waste. You can clean the aquarium without confusing Always submerge the pump completely, otherwise it will stop working. Remove the filter element. Remove the final cover from both ends of the filter element. Thoroughly rinse the accumulated impurities under running water