Operation: Please refer to "Components" on how to assemble the intake and output tubes. Then, refer to "Diagram" on where to place the intake and output tubes inside of the tank. 1) To set up the filter, unbuckle and separate the filter head from the bucket as shown in pic 1. 2) add any filter media, as shown in pic 2 (optional). Make sure to fill the canister with water (to the top of the filter media basket level). Lock the filter head back on to the bucket. 3) Then, put the intake & output adapter on to the filter head. Push down to lock the handle as shown in pic 3. 4) To prime the canister, pump the blue primer button on top of the filter head. This will prime the filter by drawing water through the green tubing. Repeat this until the green tubing is filled with water - it may take up to 3-5 minutes (optional: when attaching the green tubing, fill it up with water to speed up the process of priming). 5) Please be aware of the UV light indicator on top of the filter head as shown in pic 5. The light is dimmed when the UV light is on. 6) Once when the water is flowing through the green tubing, you have successfully primed the filter.