hanna checkers

[redseaapples]

has anyone found the hanna checkers to be less than accurate? ive found my alk hanna checker appears to be out in comparison to a proffesional test ..ive triple checked as i know measuring the 1 ml is critical...
all my other checkers appear to be ok ..alk has not been used a lot ..reagent is brand new

 

[jrill]

has anyone found the hanna checkers to be less than accurate? ive found my alk hanna checker appears to be out in comparison to a proffesional test ..ive triple checked as i know measuring the 1 ml is critical...
all my other checkers appear to be ok ..alk has not been used a lot ..reagent is brand new

No, mine are pretty close to icp. But it is still a hobby grade kit so factor in the error level listed

 

[griss]

No, mine are pretty close to icp. But it is still a hobby grade kit so factor in the error level listed

This. I’ve not seen issues with any other than the calcium being more work than it’s worth IMO.

 

[wvned]

It is a manufactured hobby device. I would be truly surprised if there wasn't a bad one now and then.

But no I have not found Hanna checkers in general to be inaccurate.
The cuvettes have to be clear and clean and no bubbles inside when measuring.

It is more important that the device provides a repeatable value on a test. Run 3 tests. Do they agree? If they do apply a correction factor to the amount so it reads comparable to the other test you reference.

They are hobby grade devices. That is why we can afford to own them.

 

[Uncle99]

Alk, Nitrate and phosphate (phosphorus) on the money.
CA and MG were both inconsistent. CA ran high at 468-523ppm, actual 420. MG 1500-1580ppm,actual 1465ppm.
The reason for this is likely the small sample size used.
It depends on what “out” means in terms of the variation you are experiencing.

 

[FishMann]

Which ones are worth it over salifert? Brs has them on sale.

 

[kharmaguru]

Alk and phosphate for me. Hanna alk is super simple and consistent, and it's been a while but I think I switched to the Hanna phosphate because the Salifert was impossible to read. I like the salifert nitrate and wouldn't switch that one although I never tried the Hanna.

 

[jrill]

Alk, Nitrate and phosphate (phosphorus) on the money.
CA and MG were both inconsistent. CA ran high at 468-523ppm, actual 420. MG 1500-1580ppm,actual 1465ppm.
The reason for this is likely the small sample size used.
It depends on what “out” means in terms of the variation you are experiencing.

I have found the Hanna magnesium test to be way off. The Calcium has been tracking with icp as long as you use distilled water as directed.

 

[wvned]

I just use my RODI water.

 

[griss]

Alk and phosphate for me. Hanna alk is super simple and consistent, and it's been a while but I think I switched to the Hanna phosphate because the Salifert was impossible to read. I like the salifert nitrate and wouldn't switch that one although I never tried the Hanna.

I’m surprised you like the Salifert nitrate. I can’t tell the color difference.

 

[kharmaguru]

I’m surprised you like the Salifert nitrate. I can’t tell the color difference.

I always do the side view and divide by 10. I honestly don't think exact numbers for nitrate are that important.

 

[griss]

I always do the side view and divide by 10. I honestly don't think exact numbers for nitrate are that important.

I do that as well but still 90% of the time I’m thinking “it’s either this one or this one.” lol