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Originally Posted by TNTCanada
I was using a Hagen test kits for everything. I used a Salifert CA test kit and found out my CA was sitting at 250ppm when the Hagen was saying it was just over 400ppm. So I have switch over to Salifert find they are easyer to use and are more Accurate. I have also run tests with one Salifert test kit to another Salifert test kit and they match up really close. Did the same with Hagen they were quite a bit off.
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I find with hagen test kits they work well when you shake the crap outta the reagents before testing..it's when you don't shake them good, I find is when you get the wonkey results.
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