When I needed it I got the reps number from the place I bought the Tunze, you might start there.
From their website
TUNZE GmbH High-Tech Aquarium Technology: How To Contact Us
Contact us:
TUNZE USA LLC
305 Victor St
78753 Austin
Telephone: (512)-833-7546
Facsimile: (512)-832-6082
E-mail address:
tunze@sbcglobal.net
Website:
www.tunze.com
And:
Technical Assistance
If you need technical assistance for a TUNZE product, your first contact should be your local specialist dealer. We will be pleased to name a technical service station in your vicinity or to help you directly.
Please describe your problem as detailed as possible, and get in touch with us by email or facsimile. In case of uncomplicated repairs, we can send you spare parts or entire component parts very fast. If and when necessary, you can also make use of our repair service in the works.
When shipping a TUNZE® product, please include the completed repair form.
Hope that helps.
