Magic Vac Spa Cleaner, simple to use, simple to clean, no power required. Made from Super tough Plastic this simple vac allows you to clean the bottom of your spa or water features etc, simply by holding your thumb on the top, submerging the vac, let your thumb go and the vac will automatically start sucking the dirt etc from the floor. When it stops sucking, repeat the process. Will take approx 3-4 of this action to clean the bottom of your spa floor! Easy...