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Help keep your fish healthy and thriving by testing your aquarium water regularly with API's easy-to-use 5 in 1 Aquarium Test Strips. Poor water quality can cause fish stress, illness and can even lead to fish loss. API's 5 in 1 Aquarium Test Strips measure five of the most important aquarium factors including pH, nitrite, nitrate, carbonate and general hardness. Just dip a strip directly into your freshwater or saltwater aquarium and use the color-coded chart to determine if your water is safe, or if adjustments are needed. Then follow the recommendations to treat the water—it’s that simple!

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