Amazon.com : Tetra EasyStrips 6-In-1 aquarium
6-in-1 EasyStrips. Tetra 6-in-1 EasyStrips are easy to use. Just a quick dip in your aquarium water, a 60- second wait, and you will find out your results. This amazing advancement gives you the most accurate results compared to other products that often indicate higher, inaccurate readings.
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