The Planted Tank Forum - View Single Post - reliable brand of PH and TDS meters?
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Old 05-20-2013, 11:52 AM   #3
somewhatshocked
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For TDS, I stand by the $10 blue units on eBay.

Since pH meters mostly have to be calibrated before each use, I'd say the best brand is no brand unless you've got dozens of tanks and need to test pH with frequency.
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