I just got the Hanna Phosphorus ULR and did a check of my rocks that are currently curing in salt water. I got the reading at 27, is that mean its .027 ppm?
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Here's the Hanna chart.I just got the Hanna Phosphorus ULR and did a check of my rocks that are currently curing in salt water. I got the reading at 27, is that mean its .027 ppm?