Hanna calibration kits

[Myka]

Originally Posted by Reef Pilot

Does your 3:00 minute timer come on after pressing C2?

Yes.

Originally Posted by DSlater

Do you feel your PO4 readings are high, low, or just inaccurate?

The readings are unusually low.

Originally Posted by DSlater

"Hello,
The HI 713 is not designed to test salt water but fresh water.

Well that is certainly interesting. I checked on various online vendors and every vendor I checked listed the HI713 as marine and freshwater. I checked the Hanna Instruments website and indeed there is no mention of marine use where the HI736 phosphorus checker does mention marine use. That is something else altogether!