The Stain Remover is submersed underwater to apply a small
amount of acid right on a rust or algae stains. Simply attach to
a pool pole and thread supplied hose and cap attachment onto a
gallon container of muriatic acid. Gravity and siphon action
draws into the applicator head and onto the stain. The unit has
a cleaning area of 3" diameter and is as effective as a mini
acid wash but far more economical. Weight: 2 3/4 lbs.