Zeolite removes ammonia to keep water clean and fish safe. Zeolite is a natural ammonia-removing mineral for use in freshwater aquariums. It works well in both newly set-up aquariums to help prevent "new tank syndrome" and in established aquariums to prevent sudden "surges" in ammonia. Zeolite works in all types of freshwater aquariums.
As with all zeolite it is best to rinse before use.
In granular form appx. 1/4" in size
The one pound size is packaged in a resealable standup pouch. The 5, 10 and 15 pound sizes are packaged in a bulk plastic bag.