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Anyone use the Hanna ultra low phosphorus meter?


fishmanmike01
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I use that same meter. To convert from parts per billion to parts per million you multiply the reading on the meter by 0.003. I try to keep it under 0.10 and above 0.03.


The instructions that come with this meter are actually pretty bad. The colorimeters I use at work have a much "tighter" procedure. You can increase the precision of your readings greatly by doing a few things. Make sure that you orient the glass tube in the same rotation for both the zeroing and the actual reading, make sure there are no fingerprints on the tube, and roll the tube to get rid of any bubbles or particles on the walls of the tube before inserting into the meter.

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