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AMMO-LOCK is scientifically proven to protect fish cells against ammonia


  • Detoxifies ammonia in aquariums
  • Works instantly

Follow API Easy Care Guide and use AMMO-LOCK when:

  • Addressing Water Solving Problems to neutralize the ammonia

If the aquarium tests positive for ammonia, act quickly by doing a partial water change and then neutralize the ammonia.  Ammonia is toxic to fish cells, especially the gills.  AMMO-LOCK is a liquid treatment proven to protect fish cells from ammonia.  AMMO-LOCK works instantly, in both fresh and saltwater aquariums, to detoxify ammonia and remove chlorine and chloramines. AMMO-LOCK locks up ammonia in a non-toxic form until it can be broken down by the tank's natural biological filter. Eliminates fish stress and promotes healthy gill function.  


To learn more about how AMMO LOCK protects fish cells, click above on the Science Inside logo.

 Treats: 5ml treats 10 U.S. gallons of aquarium water

Directions: Use the API Dosing Cap on the Bottle.  Add 5ml per 10 U.S. gallons of aquarium water.  Continue to add AMMO-LOCK every 2 days until ammonia is not detected.  If, after 7 days, ammonia is still present, perform a partial water change, service your biological filter and reduce feeding. 

Tip: AMMO-LOCK does not remove ammonia; it converts it to a non toxic form.  After using AMMO-LOCK, your aquarium water will still test positive for ammonia even though it is in a non toxic form which will be removed by the biological filter. 

Item #:                                 Treats:

1oz. 45A                               Up to 60 U.S.

4 oz. 45C                              Up to 236 U.S. gallons

8oz. 45D                               Up to 474 U.S. gallons

16oz. 45E                             Up to 946 U.S. gallons


Water Problem Solving