Ideal for deep cleaning or quick aquarium maintenance Easily remove substrate residue without disturbing the lower layer of gravel. Please note the usage in the video and on the detailed information page. Improper use can cause clogging. The automatic pump removes water and fills the aquarium with water. Adjust the height as needed This eco-friendly product supports aquatic life in a green way The device can do both Can be used in both freshwater and saltwater aquariums, and the water depth can reach about 70cm. Design 2 in 1 Thanks to its 2-in-1 design, it can be used as a suction and water changing system for quick and easy cleaning without the hassle of lifting or cleaning Ideal for quick and efficient cleaning, can reduce and simplify maintenance time. It can effectively remove trash and other harmful particles without disturbing the lower gravel layer. Take care of your aquarium and aquatic life in an environmentally friendly way, improve filter function and keep fish and plants