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Old 11/24/2019, 11:53 PM   #1
pisces 12
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Ulr hanna checker

Has any one else have crazy readings on this ,my reg checker reads 0.00 my ULR is reading 0.07 after using 3/4 of a bottle phosphate RX and 4 cups of rowa phos on a total water volume 320gals something don't add up


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Old 11/25/2019, 12:09 AM   #2
bertoni
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Well, we do see problems with reagents, so I wouldn't be surprised if the ULR is wrong. Maybe a local fish store or a friend could make another test for you?


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Old 11/25/2019, 11:50 AM   #3
mrtint
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Mine has been pretty solid but my Hanna Calcium checker decided to start reading 600 (flashing) this weekend. I keep salifert as back up for testing.
My Hanna Alk tester started reading random numbers once. That turned out to be a low battery


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Old 11/25/2019, 01:12 PM   #4
Uncle99
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Quote:
Originally Posted by pisces 12 View Post
Has any one else have crazy readings on this ,my reg checker reads 0.00 my ULR is reading 0.07 after using 3/4 of a bottle phosphate RX and 4 cups of rowa phos on a total water volume 320gals something don't add up
Yup, mine not consistent, same with CA checker, Alk is great.
Back to Salifert.


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Old 11/25/2019, 01:43 PM   #5
mrtint
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I just picked up a Trident this weekend


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Old 11/25/2019, 03:38 PM   #6
hkgar
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I just picked up a Trident this weekend


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I don't think that reads PO4


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Old 11/25/2019, 03:40 PM   #7
mrtint
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I don't think that reads PO4


your right. I got off subject


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Old 11/25/2019, 03:42 PM   #8
reefgeezer
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I've noticed that the vial clarity in the ULR is important. Dirty or scratched vials tend to result in elevated readings. Even fingerprints can mess up a test. BRS sells new vials for cheap. I replace mine when I order reagent.

Considering the accuracy/precision of the two units, the 713 could read 0 ppm while the 736 reads (25 ppb) .07 ppm. However, if the number doesn't change after all you've done, I'd suspect an issue with the vial or maybe the reagent.


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Old 11/25/2019, 07:39 PM   #9
Djbeasley05
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I agree with making sure the reagent number matches the actual checker. I bought the wrong reagent one time and results were not accurate.


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Old 11/26/2019, 10:13 AM   #10
rayjay
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For me, I had errant reading with my ultra low until I realized that the powder wasn't totally dissolving. I confirmed by looking at drops of the sample under the microscope. The powder was inhibiting proper readings just like dirty glass of the vial and I could sample 5 tests one after the other and not have any agree with another.
As I couldn't control the timing stages of the testing I ended up warming the sample to about 90-95F BEFORE doing the test. This allowed the powder to dissolve completely within the timing of the tester.
I was able to dissolve the powder at the temperature of the tank by shaking it longer, or even letting it sit for a bit, but by then the tester timed out.


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