🌞1. Before using the fish tank, add water first. Then connect to the power supply, as solid as above, the fish tank clamshell to pull out, and then flip up, the Android line is inserted into the input port of the fish tank's Android power cord, the other end is inserted into the SV, 2A (or greater current) of the mobile phone charging head, the mobile phone charging head is connected to the 220V power supply. The fish tank isin standby state. 🌞2. Connect the power cable of the pump to the USB power outlet of the fish tank, and the pump will immediately pump water. 🌞3. When the fish tank is in standby state, press the light switch button to turn the light on to first gear; Another short press, the light changed to second gear; Another short press, the light changed to three;Press it again. The lights turn off.White/Back Filter Fish Tank White Back Filter Fish TankSize: 20X15X20.5cmContains:White fish tankWater PumpBiochemical CottonThickened filter cotton * 1CableLED lightsBlack Back Filter Fish TankSize: 20X15X20.5cmContains:Black fish tankWater PumpBiochemical CottonThickened filter cotton * 1CableLED lightsBackfilter Cycle Ecological Fish TankSave a copy of "nature" by your side1.No water change2.USB Power3.Back Filter4.LED Lamp Beads5.Light Adjustable6.One PieceHigh Definition and Transparent Enjoying Natural BeautyThe outer cylinder is formed with integrated technology, and the PC material is explosion-proof, wear-resistant, and has a light transmittance comparable to glass ultra white cylinders, enjoying an immersive panoramic viewSilent Water PumpLED Fish Tank LightCreating a Beautiful Underwater WorldThree levels of lighting and one level of colorful lightingMute button light adjustmentCreating a Colorful Underwater WorldHigh Brightness and TransparencyLight Brightness DisplayLow, medium, high brightness and dazzling colors can be selected according to needsUSB Power Supply 5V Low Voltage5V DC voltage, USB DC power supply system, comprehensive safety protection, not afraid of power outage riskFilter Circulation SystemFilter impurities and fish feces in the water,effectively reducing the frequency of water changes to avoid damaging the ecological environment inside the tankTop Opening Design More Convenient FeedingIt is recommended to consume a small amount at once and finish it within 2 minutes