Well what do you want to use it for?
It claims to remove ammonia, nitrite, nitrate, and toxins I used at one time to help with high nitrate problem. Ammonia, nitrite, toxins sure but will it rid your tank of nitrates no. I wanna say it helped keep my nitrates in check but I wasn't truly convinced.
If you want to use chemical filtration then I suggest Seachem Purigen. After a month of using it I was satisfied with the results it removed some not all of my nitrates and it works very well at removing driftwood tannis.