My Giesemann phosphates keep reading 0 ppm even though the reagent vial is full and Hanna ULR is giving me 0.1 ppm.
I'm starting to get a little frustrated. Not sure it's reefbot or just all the different test kits.
My RedSea alk has gone haywire. Before it was consistently 0.3 dkh lower than Salifert and Hanna (manual). Then it gave me a 5.3 dkh reading. Thought it was low reagent so I refilled the reagent. Still was getting low numbers so I went to recalibrate. The calibration was off and I needed to redo the calibration like 3 times. Now the Redsea alk is giving me 1.0 dkh higher than salifert. Salifert is giving me up to 0.5 dkh higher than Hanna manual. What caused it to lose calibration out of the blue?
My Redsea mag is giving me crazy numbers too. It's now reporting 1560 ppm vs salifert (manual) 1320 ppm.
As mentioned above, Giesemann phosphate only reports 0 ppm for me. I gave up on that. Waste of >$50 reagent there.
API Nitrate reports only 0 ppm for me (salifert 1-2.5 ppm manual), so I don't really bother with that anymore either.
The only consistent reading for me now is API Ca, which exactly matches my salifert Ca manual testing.