API 5-in-1 Aquarium Test Strips – Water Quality Kit (100 Strips)
Fast, reliable water testing for healthier aquariums.
The API 5-in-1 Test Strips provide an easy and accurate way to monitor essential water parameters in both freshwater and saltwater aquariums. With 100 test strips per box, you can quickly check water conditions and help prevent invisible problems that cause fish stress or loss.
Ideal for weekly maintenance or diagnosing water-related issues, these strips give you rapid results in seconds—just dip, wait, and compare with the color chart.
Tests 5 Essential Water Parameters
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pH – monitors acidity and stability
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Nitrite (NO₂) – detects early toxic spikes
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Nitrate (NO₃) – helps prevent long-term water issues
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Carbonate Hardness (KH) – supports pH stability
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General Hardness (GH) – important for fish health & osmoregulation
Perfect for community tanks, cichlids, goldfish, reef tanks, and more.
Why Aquarium Keepers Trust API
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Results in seconds
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Simple dip-and-read method
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Helps prevent fish stress, illness and water-quality surprises
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Suitable for saltwater and freshwater
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From a brand with 60 years of aquatic expertise
Package Includes
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100 × 5-in-1 Test Strips
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Color chart / instructions
How to Use
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Dip a strip directly into your aquarium.
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Hold horizontally and wait a few seconds.
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Compare colors to the included chart.
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Adjust water conditions if needed.
For best results, test weekly or when fish appear stressed.
Perfect For
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Freshwater tanks
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Saltwater tanks
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Reef aquariums
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Beginners & experienced aquarists
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Quick maintenance checks
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