Aquarium Pharmaceuticals Ammo-Lock, This patented formula converts toxic ammonia into a non-toxic form which can be easily digested by the biologcial filter.
(Manufacturer: AQUARIUM PHARMACEUTICALS - Part No: 2031167 - SKU: 3111748)

Instantly breaks the chloramine bond, neutralizes the chlorine and detoxifies ammonia. Eliminates the ammonia that is constantly forming in the aquarium due to fish waste and uneaten food. Eliminates ammonia stress and protects healthy gill function. One 16 ounce bottle treats 960 gallons of fresh or salt water. ...Read More (specification)