API Ammo Lock Ammonia Detoxifier – 1 Gallon, Fresh & Saltwater

Keep your aquarium water safe with API Ammo Lock, an ammonia detoxifier that works instantly to protect fish from one of the most common — and deadly — threats in fishkeeping. Ammonia builds up naturally from fish waste, uneaten food, and decaying organic matter, and even small amounts can stress fish, while larger amounts can be fatal.

Ammo Lock doesn't just remove ammonia — it converts it into a non-toxic form, along with detoxifying chlorine and chloramines in both fresh and saltwater aquariums. You'll see a measurable reduction in ammonia levels using any API Test Kit, though a 25% water change is still recommended after dosing for best results.

Backed by nearly 60 years of trusted expertise, API is dedicated to helping fishkeepers create a safe, thriving underwater world — from testing kits to water conditioners and premium fish food.

Key Features

• Instantly detoxifies ammonia, chlorine, and chloramines
• Safe for both freshwater and saltwater aquariums
• Converts ammonia into a non-toxic form
• Measurable results with API Test Kits
• 1-gallon bottle for extended use
• Dose every two days until ammonia is undetectable
• From a trusted brand with almost 60 years of experience

Usage Note:
If your aquarium tests positive for ammonia, perform a partial water change first, then treat with Ammo Lock as directed on the label.