Best Seller | Bill s Perfect Fertilizer Size: 8 Ounces by Spray-N-Grow About Hydrofarm Inc. Celebrated as the nation s oldest and largest manufacturer of hydroponic equipment and grow lights Hydrofarm has made professional-grade equipment available to all since 1977. All grow lights and electric components are UL listed... more | | $18.99 $17.99 FREE shipping go to store |