Pro-Z Laboratory-Quality Ammonia-Removing Zeolite crystals are fast acting, long lasting, and proven to remove ammonia, the #1 fish killer
	
85 ounce bottle
	
Zeolite crystals are designed to keep your fresh water aquarium clear for up to 4-6 weeks
	
Recommended for use in Cascade, and all other hang-on, internal and canister filter systems