rx clear algaecide 50 plus | 50 percent concentrated liquid algaecide for above or in-ground swimming pools | safe non-foaming formula | keeps algae in suspension | one quart bottles | 6 pack rx clear <p>the rx clear coats walls of the pool, keeping algae in suspension. surfactant splits open algae cells, helping to destroy them. the rx clear swimming pool algaecide works best in warm waters -- helping the product not stain the surfaces. use 4-6 oz per 10,000 gallons. to avoid foaming, do not exceed beyond the recommended dosages.</p>