Amosijoy canister Filter: AMOSIJOY external aquarium filter runs at 172gPH(650LH) wattage is 8w dimension is 122AAA79AAA 61AA It is recommended for 30 gallon freshwater fish tanks turtle tank and aquariums Lift-draw Style Vent Valve & Flow Regulating Handle: After power up drain the air out of the pump and supply water for the pump by lifting the lift-draw style vent valve and then the filter will enter proper working condition without the need of additional water adding By controlling the top water flow regulating handle the water flow could be adjusted from maximum to minimum even to zero Ultra-quiet Operation: With built-in motor in the lid of the canister filter the filter runs ultra quietly Low wattage and high flow without air inside the filter generates no noise The sound is = 30db your family life will not be affected at the same time achieving water purifying effect Filter Basket: Amosijoy 172gPH external canister filter has one layer of media basket in which different kinds of filter materials can be placed to purify the water ensuring the water quality of the living environment for aquatic life You can add some other filter media depending on your needs complimentary bio balls ceramic bio balls speed up decomposing the fish feces avoiding frequent change of cotton filter