Like other elements that make out lives and gardens look beautiful, the pool is a space that completes our lifestyles. Design and usability are important, but the secret for an impeccable pool resides in the connections to the filtering and cleaning systems that you use. One of the major problems involving pools is the presence of algae. Algae are vegetal micro-organisms which ensure a nutritive environment for bacteria. For a perfect sanitary quality of the pool, it is important to maintain the water and surfaces algae-free. It is not always possible to eliminate the algae with chlorine, because they can become chlorine resistant. Outside pools, in particular, need additional treatment in order to prevent and eliminate algae. In this case special products against algae can be used.