Hanna alk checker worth it

[Alfrareef]

I love it. Have the ppm version.

 

[mystersyster]

I finished my last reagents with my tank ranging from 124-126 ppm for a few weeks. Tested with new reagent side by side.... tested 121ppm

Thats 6.765 dKH vs 7.044 dKH

Precision is on point, accuracy, not so sure.

I ordered a salifert test to compare... stay tuned.

 

[Chuk]

I have both the red sea kit and the hanna checker (ppm version). I got the hanna kit when I was running low on the red sea reagent and I was on sale for 50% off. While the hanna kit is easy to use I like the red sea kit better since its a straight titration and I can see exactly whats going on even though sometimes the color change from purple to blue can be hard to detect. The hanna checker has given me some funky high readings at times. I mostly use the hanna checker now as a double check of my red sea kit if I think I missed the color change.

 

[Centerline]

I have the hanna checker and love getting a digital reading, but I am experiencing the same problems as others with hit or miss reagents. I just got some new reagent and it test 6.16 compared to the old reagent and red sea testing at 8.7. That is a huge difference.

What is worse is that I contacted Hanna tech days ago and have yet to receive a response on the reagent or lot number.

So question for those that get bad reagent, the bad reagent is at least consistent with its readings over several test, can I just add the amount to every reading it is off. For example the new bottle consistently reads 110 ppm when the old bottle read 157. Can I just add 47 ppm to the new bottles readings to get what the reading should be? Would that work?

I know the reagent is only 8 bucks but if I have to go through a couple orders to get a good bottle I mine as well just use my red sea kit.

May want to score some of the Hanna standards for ALK - brs sells them and they will let you know pretty quickly if you have a problem.
https://www.bulkreefsupply.com/hi75...rds-for-hi755-hanna-checker-marine-water.html

 

[Randy Holmes-Farley Verified Community Expert]

May want to score some of the Hanna standards for ALK - brs sells them and they will let you know pretty quickly if you have a problem.
https://www.bulkreefsupply.com/hi75...rds-for-hi755-hanna-checker-marine-water.html

Just to be clear, those are not actually alkalinity standards. They are just color standards to ensure the machine is reading colors right, but it does not ensure the combination of reagents and alkalinity in seawater reacts gives the "correct" color.

(FWIW, in reality, "color" is not the correct term, but rather absorption standards, but I simplified it for this purpose)

 

[Centerline]

Just to be clear, those are not actually alkalinity standards. They are just color standards to ensure the machine is reading colors right, but it does not ensure the combination of reagents and alkalinity in seawater reacts gives the "correct" color.

(FWIW, in reality, "color" is not the correct term, but rather absorption standards, but I simplified it for this purpose)

So don't assume using the standards for calibration means you have a reliable reading for alk?

 

[Randy Holmes-Farley Verified Community Expert]

So don't assume anything even using the standards.

It just means they aren't perfect for checking if the final results are accurate.

 

[JMetaxas]

I just checked my Hanna Alk Checker tonight with the standard. Spot on 5.5kdh, or 100ppm.

 

[Randy Holmes-Farley Verified Community Expert]

I just checked my Hanna Alk Checker tonight with the standard. Spot on 5.5kdh, or 100ppm.

Again, though, don't be misled as to what that is telling you. That doesn't say it is giving correct answers when you test actual water samples. .

 

[Adele]

+1 for Hanna but with the disclaimer that I have never used another method for Alk. I do use Salifert for Mag and Cal. I can say that when my Alk is below my target range of 9.0 dkh and I use the BRS Alk calculator to make a dose (by hand, no doser pumps yet for me) the next test done 15-20 minutes later is spot on at 9.0. So if that is a salifert 10 I am still okay with that. Consistency is my game and so far the Hanna is providing that. But after reading some of the other posts, I am concerned about my new box of reagent I am about to open.;Wideyed