RECALL: Check Your Hanna ALK Reagent NOW!!

[Ginu]

Recently I've found a post on a different forum with a recall on Hanna Alk reagents which happen to be spoiled.

If you haven't been checking your reagent before using them to make sure it's good, then do it now. So far five of my Alk reagent bottles were bad.

LOT 5423 IS BAD
LOT 5554 IS BAD

Go to this link and enter your Lot number and see if you qualify for a replacement. From my research stores are still selling bad stock, so check before you buy!!!

I broke out my new and unused Red Sea Alk test and found the following:

My display tank running zeovit and been testing Alk with the same bad reagent batches for at least six+ months:
Yesterday I was reading 8.58 on Hanna and 10.2 on Red Sea(new kit opened yesterday)
Today I was reading 7.56 on Hanna and 9.1 on Red Sea - stopped dosing yesterday to lower dKh
Based on the bad Hanna reagent I've been running this tank at 8-8.5 on Hanna Alk Checker which in reality is 9.8-10.5. no wonder sps kept on slowly dying.

My frag tank last night was reading 9.52 on Red Sea and 7.62 by Hanna Checker, so a discrepancy of 1.9 dKh - not too bad on this as this system is not running on zeovit so it doesn't need ULNS (only problem is I just finished cycling this tank a week ago so its empty)

[Myka]

Thank you for sharing!

I entered my lot#5489 and it says mine is bad too even though it reads the same as my Salifert test kit. Weird.

[Ginu]

Originally Posted by Myka

Thank you for sharing!

I entered my lot#5489 and it says mine is bad too.

From my one day research it shows as all reagents from Q2 2015 and up to today(unless new stock) is bad, so best to check the reagent and check against a different product like RedSea or Salifert.

I checked against a friends Hanna a while ago and results were similar... little did we know both of our reagents were off...

[Myka]

That probably means the whole last bottle I had was "bad". I always check alkalinity against both Hanna and Salifert since it's so important, and I've always had very similar results, including this "bad" batch of reagent.

I'm going to move this to the Reef forum just so that more people see it.

[duncangweller]

Thanks for the heads up. I'll check mine later

[shiftline]

It says both mine are bad.
5672
5441

I mysteriously lost a small chalice and an acan in the pat few weeks. I wonder if that's why..

[Wheelman76]

Both of my reagents are bad and I think all the recent batches are bad. I picked up a Salifert test today to double check , and even though it says my Hanna reagents are bad , they are still in line with the Salifert. So I'm not too worried about it.

[Proteus]

I stopped using hanna alk checker last year due to inconsistent reagents

Thanks for this I'll share it on local fb pages

[mseepman]

I just checked mine and was bad. I have had some real issues with Alk lately and only just recently started using this bottle. Had a handful of coral death lately...very frustrating.

[BobFish]

Hanna Instruments recently discovered that there is an issue with some of the HI755-26 alkalinity reagent kits, and our records show that you may be affected. Even if you have had no problems with your tests and sampling at this time, please take a moment to check to see if the possibility is there.

1. Follow this link:
https://hannainst.wufoo.com/forms/w1hzjs2j1b4ejyu/

2. Type in your reagents “Lot” number. If your reagent is from a batch that may be or eventually can have erroneous readings, it will be replaced free of charge directly by Hanna. All you will need to provide is shipping address and proof of purchase. Hanna also offers a 5% off coupon in their store for those affected.