Three modes: The 3-in-1 aquarium cleaning tool sucks water, removes algae and cleans gravel. MULTIPURPOSE DESIGN: The gravel cleaner can attach battery and be used directly by adapter. Adjust the different lengths: 62 / 73 cm, suitable for medium and large aquariums. EASY INSTALLATION AND USE: Installed gravel cleaner, please keep the water level between MAX (60cm) and MIN (20cm), then start the switch. The water in the aquarium is automatically pumped out by a hose to change the water. Cleaning Function: Can also clean gravel that can effectively siphonate fish debris and other dirt without requiring water change. Feature and additives: High security performance, only need 2 size C alkaline batteries (package not included). The blue hose length: 75 cm.
