Hanna Alk reagent

SoloGarth said:
I'm not sure how a green dot overrides the Hanna website stating the reagent is bad? The known bad ones I am sure passed at the time.
Click to expand...

Because they removed the faulty lid and replaced it at the factory, then applied a green dot. If you have the green dot on your reagent it's good no matter the lot #.

Me too d2mini!
 
hogfanreefer said:
Because they removed the faulty lid and replaced it at the factory, then applied a green dot. If you have the green dot on your reagent it's good no matter the lot #.



Me too d2mini!
Click to expand...


Well no green dot. I'm not sure I would trust that anyway. If the lot is bad I'm calling it bad.
 
Still waiting on my replacements as well. Although I did pickup a refill for my redsea and they both tested the same. But given the fact that these bottles almost always leak I store mine upright.

I also don't have the green dot
 
Opened up the second bottle and tested alk and this bottle did have the foil seal same as last one. Got some different readings.

Redsea. 7.8
Hanna first bottle 7.8
Hanna second bottle 8.2
 
Salifert 10.9dKH
Hanna Lot#5554 (bad) 8.4dKH
Hanna Lot#5705 (bad) 10.02dKH

I have a total of 3 bad reagents 1 Lot#5554 and 2 Lot#5705
2-4 weeks to ship is way to late. Im glad I have other test kits to verify like Red Sea and Salifert.

Thanks to the member who originally posted the information and the link.
 
UNBELIEVABLE! I have been looking for an excuse and I think this is it. It is now time for an Apex... Bye bye Hanna!:wavehand:
 
I've purchased 3 of these during the last 8 months and all are bad.

At one point I noticed my Hannah checker was off and I got a Red Sea Alk test as a backup. I thought it was my fault for not cleaning the bottles correctly or something else.

Replacements are on the way. And while I test alk every week with Hanna, once a month I use the Red Sea test to make sure everything is on point.
 
powderblue1 said:
Good thing I have a CO2 probe. Please don't laugh at things you clearly don't understand. Knuckleheads...:hammer:
Click to expand...


What? Well yes please help me understand. A CO2 probe? Do you mean pH probe? That does sort of measure CO2. But in no way can it replace an alk test.
 
You don't hook the CO2 probe up to the APEX. Yes I know it doesn't measure ALK directly. Alk is more than one ion. Yes you need pH to do the math. You've probably read this?:thumbsup:
http://www.advancedaquarist.com/2002/5/chemistry
I'm sure Randy will explain things further if you want to delve in. Bottom line is if you have lab-grade instrument values for pH and CO2 you can most certainly get very close on the true ALK concentrations when under 8.5.:reading:
 
powderblue1 said:
You don't hook the CO2 probe up to the APEX. Yes I know it doesn't measure ALK directly. Alk is more than one ion. Yes you need pH to do the math. You've probably read this?:thumbsup:

http://www.advancedaquarist.com/2002/5/chemistry

I'm sure Randy will explain things further if you want to delve in. Bottom line is if you have lab-grade instrument values for pH and CO2 you can most certainly get very close on the true ALK concentrations when under 8.5.:reading:
Click to expand...


Interesting. Although I would think if it was really that easy then people would measure alk this way. If this is possible and relatively accurate I am surprised Neptune doesn't have a module for measuring dissolved CO2 and calculating alkalinity. I would like to hear more about this from some chemist types.
 
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