Function: 1. Release high concentration of active ozone every minute and actively break down harmful substances such as formaldehyde and nitrite. 2. It only decomposes harmful things in the water without harming the fish, no need to use it daily, simple and hassle-free. 3. Do not take up space in the aquarium, it can be used as soon as it is connected to the air pump. 4. With the function of deodorizing and purifying aquarium water, clean algae, a must for your aquarium. 5. Energy saving and low power consumption, with adjustable knob to meet the needs of working status. Specification: Item Type: Aquarium Ozone Generator Material: plastic Color: as shown in the picture Weight: approx. 480.0g/16.9oz Purpose: Aquarium water purification and algae removal Power: 6W Ozone amount: 120mg Knob Adjustment Instructions: 1. First push the adjusting dial down, then turn the adjusting dial 2. The indicator light in the work display area is on and is adjusted to the required working state 3. Stop turning the adjustment knob, the indicator light will flash until the indicator light is on and automatically enters the working state Package List: 1 x aquarium ozone generator 1 x hose 1 x air check valve No-AGO-13445035991