Key benefits - Prevents gravel and dirt from entering the hose, helping maintain effective suction and protecting the pump during use. - Two function design: sand washing and water change in one tool, simplifying aquarium maintenance. - Durable construction: made of high quality plastic with a flexible clear PVC hose that transfers liquids efficiently. - Manual control system supports rinsing and sand cleaning, with adjustable tilt on the small suction head to absorb fish waste and debris in the sand while cleaning the sand and improving water quality. - Easy to use: grip-friendly pump; a few presses cause water to flow automatically. The PVC pipe resists collapse and can be bent to any position for convenient use. - Important note: water outlet must be lower than the water inlet for proper operation. Product details - Material: high quality plastic; clear PVC hose - Function: manual control; rinsing; sand cleaning; tilt-adjustable suction head - Compatibility/usage: designed for aquarium water changes and sand cleaning; flexible hose allows positioning for various tanks - Performance: reliable, low-maintenance operation with stable water flow and effective debris removal Use scenarios - Routine aquarium maintenance: perform water changes while simultaneously cleaning the sand to remove fish waste and uneaten food. - Substrate cleaning in tanks with sand or fine gravel: target debris and improve overall water quality without disturbing the tank setup. - Reaching awkward or wide tanks: bend the hose to access hard-to-reach corners and perform precise cleaning and water changes.