Aquarium Water Siphon Pumps
This helps changing water on regular basis and pull out impurities from your tank along with water. Simply keep a bucket down near your aquarium and dip the side with nets build on it. Nets or holes helps checking out the pebbles to out along wit water while draining. Squeezing and release the blue part of siphon. Water should start coming out due to gravitational force. When you see you bucket is almost full pull out other side of siphon and flow of water should stop immediately.
The water that is siphoned out can be used to water your garden.