Information for Reef Tanks:A UV rated in the 30,000 or 45,000 µw/cm2 (EOL) is ideal for the reef environment. UV’s used at higher kill rates will destroy the planktonic food supply for the reef. Information for Marine Fish: (No reef or live rock)A UV rated in the 75,000 or 90,000 µw/cm2 (EOL) will be the most effective at controlling fish disease. All UV dosages are calculated at the end of lamp life (14 months). Specifications: 8 Watt 15 Watt Size 12.5" x 2.75" x 4" 12.5" x 2.75" x 5.5" Number of Lamps 1 1 120 Volt Amp Draw 0.42 0.42 Water Sterilization Measurements: Freshwater 5 - 200 Gallons 200 - 500 Gallons Saltwater 70 Gallons 75 Galloons Recommended Flow Rate for UV Dosages: at 30,000 µw/cm2 (EOL) GPH 642 (Max. Flow Rate) 700 (Max. Flow Rate) at 45,000 µw/cm2 (EOL) GPH 428 466 at 60,000 µw/cm2 (EOL) GPH 321 350 at 75,000 µw/cm2 (EOL) GPH 256 280 at 90,000 µw/cm2 (EOL) GPH 214 (Min. Flow Rate) 233 (Min. Flow Rate) * Information as per manufacturer