Boyu Aquarum Cleaner
1. Submerge gravel vacuum cleaner inside aquarium
2. Place otherend of hose into a bucket.
3. Open up Flow Control Valve.
4. Start "Squeezing" the Auto Sliphon pump until a siphon is created.
5. Remove fish waste and debris by lowering gravel vaccum on gravel.
6. Adjust Flow control value as needed for different size aquariums.