TERA PUMP [2PK] Siphon Vacuum Aquarium Gravel Cleaner with Bulb CAUTION: Genuine Pumps Exclusively only by SOJITEK (which owns TERA PUMP) / Other sellers sell counterfeit Pump Brand New Packaging! Don't be fooled by Counterfeit products this is the original Aquarium Gravel Cleaner by TERAPUMP. Packaging will have model number and Brand! Not Blank Generic Packaging Two Types of Nozzles: Shorter Nozzle for Drainage & the Longer Nozzle for Gravel Cleaning / Takes the Waste out too while Replacing the Water; Does not Hurt any Aquarium Fish when in Use Patented Unique Pump Filter Allows Dirt in Sand to be Discharged a Long with Water Hand Pump to Initiate the Siphon to Start Transferring Liquid from One Receptacle to Another Manually operated liquid transfer pump Portable, light weight and heavy-duty material Patented unique pump filter allows dirt in sand to be discharged along with water Doesn&#039;t hurt any Aquarium Life when in Use Removes waste while replacing the water Easily Empty Containers. User-friendly siphon work Place the <span class="a-text-bold"><span class="a-text-italic">intake nozzle</span></span> end into the aquarium and attach the it (using a <span class="a-text-bold"><span class="a-text-italic">suction cup</span></span>) to the glass. Squeeze the <span class="a-text-bold"><span class="a-text-italic">operation bulb</span></span> five to seven times. Water will start to flow out of the tank (aquarium), allowing draining and cleaning. For smooth flow, water level of the aquarium tank must he higher than the end of <span class="a-text-bold"><span class="a-text-italic">discharge hose</span></span>