Clear Pool USA offers two choices to manage your algae problems. The blue cylinder kills algae and reduces scaling for up to six months—just drop it into your pump basket. The other is an automatic water purifier that kills algae, reduces scaling and kills bacteria and pathogens including E.coli, pseudomonas, legionella pneumophila (Legionnaires Disease), staphylococcus, steptococcus, salmonella and others, some of which have been proven to be resilient to high levels of chlorine. Both products will help balance pH and chlorine levels that are important for swimmer comfort, (eyes and skin). The automatic purification system can also eliminate harmful chloramines, (that chlorine smell) for indoor pools and is guaranteed for life. Call (618) 698-3343 or e-mail firstname.lastname@example.org for more information.