Treasure Chest Opens and Closes! Perfect for Fresh or Saltwater Fish! Improves the Color of Your Tropical Fish and Enhances Fin Growth! Increases the life Span of Your Fish! Helps Reduce Bacteria and Infection by Purifying the Water! Increases the Incubation Rate of Eggs and Growth of Fry! Increases Disease Resistance! Creates an Aquarium Night Light of Unmatched Beauty! The MiracleBeam™ Laser Treasure Chest System is the most revolutionary aquarium device in the world today. After years of testing on tropical fish (fresh and saltwater), the MiracleBeam™ Laser Treasure Chest System was developed to enhance the color, life span, disease resistance, and growth rate of all your tropical fish. The MiracleBeam™ Laser reproduces a spectrum of the Sunís natural light that is inherent in tropical and reef environments. The MiracleBeam™ Laser Treasure Chest System should be left on 8 to 12 hours per day for maximum effectiveness. (May be left on continuously)