Best digital testing for No3

[AquAttila]

Hi,

I am running an ultra low nutrient system (PO4 at .04 - .09 and NO3 at around 2 - 3). I have the Phosphate UL digital hanna test kit - which works great, easy and quick. My challenge is testing for NO3 and currently using Nyos NO3 test kit and difficult to get accurate reading due to matching colors - especially at a low range from 1 - 5 ppm. I do know that Hanna does have the Nitrate low range digital kit HI781 - but many complaints on the pain it is to use as I am hearing.

I am looking at purchasing this one from Hanna - more expensive and trying to not spend money on useless equipment so want to make sure there are some folks using this with success.

Nitrate-Nitrogen Portable Photometer - HI96728

The HI96728 portable photometer for nitrate-nitrogen measurement uses an adaptation of the cadmium reduction method to measure concentrations up to 30.0 mg/L.

www.hannainst.com

Thanks

 

[LeftyReefer]

I would just get the HR Nitrate checker, the HI782.

 

[KStatefan]

What is the complaint about using the HI781? It is the same process as the Phosphate.

Was thinking about the 782 instead

 

[LeftyReefer]

The HI782 is the one you want. Its works great and the process is pretty simple. Just add one packet of reagent to your tank water sample and wait for the results.

 

[Justdrew]

HI782 is the way to go. HR Nitrate. That is the one that is like the PO4 test. The LR Nitrate has multiple steps that are just not worth the time to do.

 

[DHill6]

I’ve been using the Nyos N03 kit without a problem for years. Also running low nutrients. If it’s a close call I split the difference between the two numbers.

 

[AquAttila]

Thanks for all of the replies! I am sorry because I hardly check this unless I get an email that someone responded to a thread... well something happened because I no longer get notifications.

Anyway, a friend must be using the 781, because he kept telling me it is junk and takes many steps. I am so glad I posted as I never thought of getting the HI782 as it is high range checker. This to me meant that as I am trying to keep my NO3 at around 10, this one may not be as accurate. I am trying to fine tune my daily nitrate dosing and it becomes a bit pain to use Nyos and I just think it is very difficult to try and get accurate measurements relying on colors.

Thanks again and will purchase this 782!

Attila

 

[trevorhiller]

I wish this information was stickied in the newbie forum. Buy the Hanna High Range Nitrate checker (HI-782) and the Ultra Low Range Phosphate checker (HI-774). So confusing for new people trying to buy the right meter.