Description
API Ammo Lock 118ml
API Ammo Lock 118ml (SKU: APH28) rapidly detoxifies ammonia produced by fish waste, uneaten food, and organic breakdown. It works on contact to convert toxic free ammonia into a non-toxic form, preventing ammonia burn and gill damage. Unlike standard chemicals that disrupt the nitrogen cycle, Ammo Lock leaves the detoxified ammonia accessible to beneficial filter bacteria, allowing biological filtration to process it safely.
Usage & Application
When to Use
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Emergency Ammonia Spikes: Apply immediately when test kits reveal elevated ammonia levels to safeguard fish.
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New Tank Setup: Dose during initial cycling to protect early livestock from new tank syndrome.
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Overstocked Tanks & Transport: Use when stocking density is temporarily high or during live fish transport.
How to Use
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Dosage Rate: Add 5 mL per 38 L (10 US gallons) of aquarium water.
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Dose daily as needed until ammonia levels drop to 0 ppm through biological filtration.
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Safe for all freshwater and saltwater aquariums.
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Note: Salicylate-based ammonia test kits (such as API Ammonia Test Kits) will accurately show reduced toxicity over time, whereas Nessler-based tests may still detect locked ammonia.
Product Specifications & Highlights
Key Features
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Instant Ammonia Neutralisation: Converts toxic ammonia (NH₃) into a non-toxic locked compound instantly.
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Filter Friendly: Does not stop or disrupt the biological nitrogen cycle; beneficial bacteria continue to consume the locked ammonia.
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Stress Reduction: Protects delicate fish tissue, gills, and internal organs from chemical stress.
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Dual Environment: Formulated for both freshwater and marine systems.
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Each dose detoxifies 3.0 ppm of ammonia, 7.0 ppm of chlorine, and 5.0 ppm of chloramines.
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Locks up ammonia in a non-toxic form until it can be broken down by the tank’s natural biological filter.
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Works instantly in both fresh and saltwater to detoxify ammonia and remove chlorine and chloramines.
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Eliminates fish stress and promotes healthy gill function, which means happy, healthy fish!
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Made in the USA with love and care for your aquatic family
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Product Details
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Brand: API
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SKU: APH28
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Product Type: Additives & Supplements / Water Conditioner
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Volume: 118 ml (treats up to 893 L total aquarium volume)
Additional Information
You love your fishy friends, but sometimes they can get a little stressed out. Don’t worry, API Ammo Lock 4 oz. is here to help! This powerful formula promotes healthy gill function and eliminates fish stress caused by ammonia. Here are some more reasons why you should add Ammo-Lock to your aquarium:


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