Rena Filstar XP has Rena Crystal, what is that?

by John
(NJ)

I recently purchased a XP3 for a 55 gal turtle aquarium, the literature says it includes a "RENA Crystal" pouch...but I can't find this on your site. Which pouch is equivalent, or which pouch should be used for my tank?
By the way...this filter is amazing! I had a penguin 350 hang on filter that just couldn't keep the tank clean...in less than 2 hours your filter got it crystal clear! Now i need to change the pouch...but which do I purchase?

A: Rena Crystal is the same product as BioChem Zorb. BioChem Zorb is the main chemical filter included with the Rena XP Filstar system. In Europe this product is knows as Rena Crystal.