Follow these steps to start a siphon using the vacuum hose:  1. Get a receptacle to collect the draining water, such as a bucket. 2. Stick one end of the Hose in the tank. 3. Keep the other end of the Hose below the water level.
4. Use your mouth to suck on the lower end of the Hose like a straw. 5. Water will quickly start flowing through the Hose. Aim the Hose into the bucket.
6. Keep an eye on the end of the Hose in the Tank. Keep it away from the Jellyfish to avoid having them get too close. 7. You can move the end of the Hose around the bottom of the Tank to remove debris.