aquarium gravel sand cleaner long nozzle water changer flow controller bpa aquarium gravel cleaner fish minnow betta tank siphon vacuum water changing cleaner persuper <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.