Hanna Low Range Nitrate Checker Issue - Is it Me?

DWill

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I’ve had this error when I did my second test using the checker. In my case it was user error. I cleaned the filter housing, when I put it back together I flipped the filter plates, the round the filter sits on.

On one side of those there are slots that match up to four “ridges” on the inside of the housing halves. If you put those on upside they are raised off the filter housing and “debris” slips buy the filter. This seems to through off the test. The same thing happens you don’t align the slots with the ridges.

if it were me designing those parts I think I would have designed in a wedged “key way” that would align the plates properly and would only let the plates go in one way. I know now it’s likely to expensive to make that kind of a change because of the costing the molds. But Hanna could at least print some alignment marks on the parts or something.
 

TonyP

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Its really not that complicated once you've performed it two or three times, it becomes natural, its just time consuming. Overall, is a great test to start first, so you complete any other tests while this one is running...
I agree with BReefer13, the tester is great and I prefer the digital display over guessing on color matching. The instructions may seem too wordy at first but once you get used to using the tester - there's nothing complicated about it.
Now, if Hanna Inst. could make a Mg tester for us that would be great!
 

DWill

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I agree with BReefer13, the tester is great and I prefer the digital display over guessing on color matching. The instructions may seem too wordy at first but once you get used to using the tester - there's nothing complicated about it.
Now, if Hanna Inst. could make a Mg tester for us that would be great!
Agree. The Nitrate checker is one my favorites. Wish Hanna could fix Calcium checker so it was reliable.
 

JMetaxas

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2 out of 3 times I use this I either have stuff get past the filter paper, or it leaks through the threads.

I'm very careful too, with the gasket, paper placement, etc........

Still sucks. I emailed Hanna to request more filter paper and reagent because I've waste so much.
 

Righteous

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2 out of 3 times I use this I either have stuff get past the filter paper, or it leaks through the threads.

I'm very careful too, with the gasket, paper placement, etc........

Still sucks. I emailed Hanna to request more filter paper and reagent because I've waste so much.
Are you making sure the ridges on the discs always point inside towards the filter paper? Each disc has ridges only on one side, and those need to be facing the filter paper.

Also how fast are you pushing the plunger. It should take you about 30 seconds to empty it.
 

JMetaxas

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2 out of 3 times I use this I either have stuff get past the filter paper, or it leaks through the threads.

I'm very careful too, with the gasket, paper placement, etc........

Still sucks. I emailed Hanna to request more filter paper and reagent because I've waste so much.


Never did hear back from Hanna. I sent the note through their contact page on the website.
 

fachatga

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One thing I learned after not noticing there was a gasket and it fell out. If you use it and some stuff gets past the filter into the vial then likely next test won’t work even if you do it right unless you rinse out the filter holder with regular water without a filter in it to clear out any particulate that is inside. Once you do that and always check the gasket before you tighten. And make it tight. It works. Instructions are horrible though. For me worth it because I just can’t see colors well enough.
 

WallyB

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WOW!
I love all my Hanna Egg Testers.
Well at least the two 4 I have (Phosphate, Phospourus, Copper and Alk).
They are Great. QUick and Accurate, Fairly Consistant and Reliable.

Even turned my Hanna Alk Test Egg into a DIY Robotic 3 Tank Alk Monitor.
https://www.reef2reef.com/threads/★-diy-auto-★-alkalinity-monitor-★-3-tank-hanna-with-raspberry-pi-ardiuno-with-advanced-features.689106/

This Nitrate Egg sounds like a bit of a chore. Salifert does the job for Nitrate testing for me.
After all, how often do you really need to test nitrate. I test every 3-4 months on a Stable Tank.
 

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