Rolf C. Hagen Group
（重定向自Fluval）
Hagen Inc. (officially The Rolf C. Hagen Group of Companies) is a pet supplies company founded in 1955 by Rolf C. Hagen with the help of his brothers, Dieter and Horst. Dieter and Horst Hagen joined the company later after immigrating from Germany becoming key members of the firm.