hi,
I had some active carbon supplied with my filter but changed it out a few days ago.
The massive amount of bog wood i stuck in my tank was making the water really dark (which i liked for a bit) but wasnt clearing at all with water changes (will probably take another 6 months for all the tannins to leach out).
After sticking in the bio-chem zorb instead the water was crystal clear by the next morning. Its like looking at a whole new tank.
I'd be interested to know of any negative effects I might get from using the bio-chem, since i'm planting heavily and trying to get a decent dosing schedule worked out.
Best Regards,
John