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User1
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View BadgesI only recalibrate when the readings after changing out the bottle are substantially different than the prior readings, and I suspect it's the reagent and not an actual change in the water chemistry.
This was commonly an issue during beta testing, but recently, I change out a bottle and the numbers are usually stable. I suspect this means their quality control for the reagents is better now than during beta testing.
I also recalibrate every now and then (every 3 months or so) just as a general good practice.
You can also buy additional recalibration fluid bottles directly from Neptune; I recommend keeping a few on hand.
I don't reuse calibration fluid once opened. Main reason being that there might not be enough for 2 full calibration runs.
How frequently are you testing?
Every 2 month kit has a calibration bottle. Also that kit guarantees the reagents are from the same batch. I do not know exactly but I thought the calibration standard matches or calibrates to that batch which is why it is included. So at a minimum we should be calibrating after each 2 month reagent is exhausted.
Anything beyond that isn't necessary "unless" you reposition the Trident to a different location that changes the sample line or Trident height. Just my understanding after talking to Neptune support and the FAQ.
Also agree. Left over calibration fluid is a one and done and shouldn't be reused for the Trident. However, you can use it right after to test your manual kits (you already know this - just saying for others).