Efficient Aquarium Siphon: The aquarium vacuum gravel cleaner can pump up to 5 gallons of water every 10 minutes. The perfect tool for aquarium water changes and sand washing. perfect for fish tanks up to 10 gallons. Reach anywhere with ease: The suction tube of the siphon vacuum cleaner has been significantly optimized, becoming stiffer and thinner. Reach every nook or space between rocks or plants with ease. Easy to use: no power required! Just manually squeeze the siphon ball a few times to suck out the water. Place the siphon ball under the straw before use and point marked " down towards the bucket. Reliable Materials: The fish tank vacuum consists of clear PVC pipe and EVA siphon ball with excellent elasticity. Both ends of the air bag are removable for easy cleaning and unblocking. No harm to your aquatic pets. Colour:Photo Color Material:PVC Package Contents: 1x fish tank water changer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.