Water Tech Pool Blaster Catfish a 7.5" vacuum head, the Catfish can be used to cover large areas of the pool, the head can be removed, making the unit a powerful spot cleaner able to maneuver into corners and crevices smoothly. With the Catfish, you can clean the parts of your pool that need it quickly and efficiently, saving you time and energy. Use w/ Catfish, Catfish Li, IVAC 250, IVAC 250 Li, IVAC C2