Pro-Z Ammonia Removing Zeolite Crystals

Laboratory quality ammonia removing crystals remove ammonia from your aquarium. Contains zeolite, which has been proven to remove ammonia from tank water. Excellent for use with all freshwater fish.

For best results, replace every 4 to 6 weeks. Add to internal, hang-on tank, and external filters. (Be sure to use a filter bag to protect mechanical filter parts.) For freshwater use only. 44 ounces (1240 grams) per jar.