Pool Mate 1-2500 Poolmate Swimming Pool Iron Out Iron Out is an extremely concentrated blend of dispersive and bonding agents Iron Out will help prevent and remove stains caused by iron&#44; copper&#44; manganese and hardness salts Iron Out functions by bonding the contaminates and transferring them to the filter system for backwash Iron Out should be used regularly to prevent pool surface staining and scaling&#44; and also to help Iron Out is recommended especially for new pools while filling with water and as an effective winterizer.