TERA PUMP [2PK] Fish Tank Siphon Vacuum Cleaner with Bulb All non-toxic plastic material constructed. Main Material : P.E / Total Length 65 Manual Siphon Pump / Total Length 65 Drains up to 1.5 gallons a minute Ideal for use when replacing water in aquarium tank without damage to fishes Unique filter allows dirt in sand to be discharged along with water 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>