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It's been every time the reagent is almost done. I keep getting higher readings and when I switch to a new reagent I get the correct reading. Almost without fail for months now.Not necessarily. It would depend on how different the two test and if the little difference in water makes an impact. I don’t know. Also how many times did you use the new reagent when you first noticed the discrepancy.
It's a pretty simple procedure. Please explain user error. From one reagent to another there's a 1.4 difference? Might be you need to start checking your results with a more reliable test kit.
Nothing changed but the reagent.there are ways this could be messed up ie. not wiping the container after shaking it. using a contaminated water sampler. if there is a way to screw something up someone will find someway to do it.
accurate testing is a skill like much everything else in the hobby. it does take much to throw a reading off at all.
Hard to say why things are different hell...could be time for a new checker. I have calibrated 120k inch pound hydraulic wrenches, the gauges and the test equipment. Not going to say it's the reagent but you could be right. What you are saying is worth noting. I am going to be ordering some new reagent soon. So I will be on the lookout for abnormal readings.Nothing changed but the reagent.
It's been every time the reagent is almost done. I keep getting higher readings and when I switch to a new reagent I get the correct reading. Almost without fail for months now.
Yes, I read that. So....I guess somehow we have to count how many tests we use as we go along?That was one of the things discussed in my thread. Apparently hanna states that there are only 25 tests even though there is more fluid then 25 test. You are supposed to throw the reagent away after 25. But this is NOT something they have been clear or vocal enough about. If you use the extra tests, it gives your exact problem.
Yes, I read that. So....I guess somehow we have to count how many tests we use as we go along?
That makes for a further pain and doesn't quite make sense to me. Why would they do that?
Which could account for higher readings towards the end.10% overfill is not uncommon with scientific reagents. If the kit says 25 tests, then you have to make sure the user doesn't end up short on test #25. In this case, there seems to be some sort of potential precipitation issue over time.
There you go. I like the checker also. I just think people need to be aware of using the reagent as it gets old. In the beginning of this thread everyone was pointing fingers at "user error". Other people are noticing the same thing. I've been using Hanna checkers for years. It's just the last few months I've been noticing this.Ok, so I keep my tank at 7.9dKH. My AF mixes at 7.9 as well. I mixed up 5 gallons for today’s water change and tested the bucket. I used the last bit in the reagent bottle and it tested 6.6dKH. New bottle and bam 7.9dKH. I can see that maybe something is up by the time we reach the bottom of the bottle. If the result of this is it costs me one extra bottle a year, I’m ok with that. I love my Alk checker.
I just opened a new bottle 5 days ago. . The prior bottle my tank was consistently around 9, with the new bottle it took a sudden drop to 8.0. A couple of days later I tested at 8.0 again. No other changes.
I'm just going to use 8.0 as my new target, since everything seems happy. We'll see what happens with the next new bottle.
Why own a Hanna tester if you need to verify it? That's the point of owning oneDo you have another test kit to verify?