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Old 08-22-2007, 06:56 PM   #1
sfite
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High Alk


Just bought some salifert testing kits, and so far, my KH/Alk readings are WAY TOO HIGH. I'm at 13.1 in dKH and 4.69 for Alk. Should be almost half that. Any ideas?
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Old 08-22-2007, 07:07 PM   #2
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There are some bad batches of salifert DKH test on the market right now that are reading way higher then what the true dkh is. I forget what the batch number is. You may try a search on them and see if you just bought the bad batch.
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Old 08-22-2007, 07:13 PM   #3
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found it! This is from a salifert rep on another board.

Important information on two batches of Alkalinity kits
A very limited number of the KH/Alk kit reagent KH have very likely been contaminated in such a way that it would give a high false value.

Each batch consists of several thousands of bottles and the best possible estimate is that only 10 - 50 bottles out of a batch of several thousand have been contaminated.

So only a very, very small number of reagents (but yes, even one is too many

The two batches very likely affected are:

1106-C and 1106-F , the batch number can be found on the label of the large KH reagent bottle.

Most of the contaminated 1106-C were, luckily, already returned before even getting to the end user, very recently.

I also think that most of the contaminated 1106-F have now been located.


The nature of the contamination would be such that a limited number of bottles as a group would be contaminated untill the contamination would be exhausted.

This also shows that there was or is NO batch related issue, that is a whole batch being bad.


We have taken measures so that this, very difficult to find cause, can not happen again.


To give you an indication, we received a total of approx 45 requests for replacements in the past period. This demonstrates, also given that Reefcentral is a very large board, that the number of contaminated reagents is indeed very, very small.


Besides that the number of 45 requests also is in part from people who were unsure and since we did not have the information we have right now we did also honor their request.


I will now have also more time to concentrate on some other questions such as some differences between different good batches/good reagents. Most of them can be explained by the accuracy and precision and the value range used for calibration. However, I'll start tomorrow another thread about this last paragraph.


Please allow me to give you all a very big thumbs up because most if not all of you were and are very polite, very patient, did help me further by answering questions, did try to think together with us and came with many suggestions. I’m very, very proud to have you as a customer!

Thanks!
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Old 08-22-2007, 07:19 PM   #4
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My batch number isn't anywhere near that bad batch. Am I a bad aquarium mother?
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Old 08-22-2007, 07:24 PM   #5
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That 10-50 bad bottle estimate that RanRan quoted is a crock. It is way more widespread than that and I for one am VERY dissapointed in Saliferts response to the problem in both spreading the word that there was a mistake, and in dealing with it.

I have a batch # 0306B expiration date 2011 right now that reads 2.5 pts high. With as much money as we put into our tanks, and how many people tote Salifert as being "the best" hobby test kit to use, Saliferts response has been pathetic and they should have been much less passive.

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Last edited by Fly Guy; 08-22-2007 at 07:34 PM.. Reason: missed a number on the batch code
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Old 08-22-2007, 07:49 PM   #6
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what are some problems that could happen if kh was too high... at a point calcium would precipitate but what point would that be? and would there be any other negative effects of a high kh. with running kalk my kh is usually around 12dkh, but i use a salifert kit too, so i guess i really dont know where my kh is
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Old 08-22-2007, 10:27 PM   #7
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Quote:
Originally Posted by reefermike1 View Post
what are some problems that could happen if kh was too high... at a point calcium would precipitate but what point would that be? and would there be any other negative effects of a high kh. with running kalk my kh is usually around 12dkh,
12 is too high IMO. It takes way higher than that to cause precipitation, but at 14 you can start burning stonies. I cant tell you the scientifics of why, but ive done it. 12 wont typically do it, but if you keep it regularly at 12 and mess up just a little bit you can have some problems.

I keep my DSB tank at 9-10 and my bb tank at 7-8.
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