Fluval 11064 Aqua Vac Plus Fully submersible waterproof vacuum up to a depth of 91 cm (36 in)  traps plant debris, excess food, fish waste and more Removable integrated filter cartridge  easily detaches for waste disposal and rinsing For best results, the replaceable Fine filter Pad removes even the finest of particles for an extreme clean Built-in, automated water change system - no siphoning or annoying mess to clean up. 4 foot hosing included for easy tank-to-bucket water changes Cordless operation  includes 2 "C" batteries