These test strips are quick and easy, but are accurate as well. They can be used for both freshwater and saltwater aquariums. When I first purchased this brand, I tested my aquariums with both the test strips and the chemical kit. I found the strips to be amazingly accurate, and far easier to use than chemical tests. With 4 aquariums, I use a lot of test strips, especially since I must adjust the Ph with every water change. These are economical as well, and therefore my preferred brand. I highly recommend these for anyone with an aquarium.
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