<p>The aquarium cleaning pump kit is a system with a manual controller to help you clean the water tank efficiently and quickly with the functions you absolutely need! </p> <p>It applies to the maintenance of fresh and sea water. Each part is carefully designed to give you the best aquarium cleaning experience you can possibly have.</p> <p>Please note that:</p> <p></p> <p>Operation method:</p> <p></p> <p></p> <p></p> <p>1. Put the water changer in the fish tank.</p> <p></p> <p></p> <p></p> <p>2. Put the other end of the water pipe in the bucket.</p> <p></p> <p></p> <p></p> <p>3. Open the water valve.</p> <p></p> <p></p> <p></p> <p>4. Squeeze the air chamber gently by hand until it comes out automatically.</p><br><br> Note: If there was any problem with our Fish Tank Gravel Sand Cleaner, feel free to e-mail us on Amazon. We will reply within 12 hours and take measures. <br>If there is something wrong due to product quality, we promise a new replacement.