How long does the Sutro Test Cartridge last? April 30, 2020 03:45 Updated The Sutro cartridge has 90 tests available, and since it tests 3 times per day- will last for roughly a month. Related articles How much does a Sutro cost? What chemical parameters does Sutro test for? How often does the Sutro test? How does the Sutro take a reading? Why does the Sutro Test Cartridge rattle when I shake it? Comments 0 comments Please sign in to leave a comment.
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