A very WARM Welcome to MASA AUFWuchs.... You can try a non-sponsor (Exotic Reef). Reza stock's it. Alternatively, Aqua Concepts (also not a sponsor), or AQuality.
Have a look in our sponsor area for the sponsor contact details.
BTW: Please start give us a bit more of information on your tank/s, life stock and tank hardware - please post pictures as well..... we allways love pictures - this is the only way we can truely share your experience with you ;-)