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 Post subject: Re: WRS Test Kit Survey
PostPosted: Thu Nov 17, 2016 8:18 am 
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Looking forward to seeing these results. I'm not sure Triton will be of much use for alk test though unless I'm missing something.

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 Post subject: Re: WRS Test Kit Survey
PostPosted: Thu Nov 17, 2016 2:53 pm 
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addicted wrote:
Looking forward to seeing these results. I'm not sure Triton will be of much use for alk test though unless I'm missing something.

Triton does not test for Alk so no sample will be sent in to them this time around.

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 Post subject: Re: WRS Test Kit Survey
PostPosted: Tue Nov 22, 2016 10:36 pm 
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Here are the results from last meetings Alk test kit survey that we did.
We had a total of 8 members testing using various kits and 3 different water samples to test.

Sample #1 was fresh Aquacraft BioSea saltwater
Sample #2 was water from my 180
Sample #3 was water from Dales tank

The readings below are all dKh

Dale tested all 3 samples with his Hanna checker and got the following results:
#1- 8.3
#2- 9.0
#3- 6.5

I tested all 3 samples with a Topic Marin kit:
#1- 7
#2- 9
#3- Between 6-7 (you count the drops like an API kit)

Carl tested 2 samples with a Salifert kit:
#2- 9.0
#3- 6.4

Eric tested all 3 samples with a Hanna Checker:
#1- 9.1
#2- 10.1 and 10 (he tested that sample twice)
#3- 7.1

David tested two of the samples using both Red Sea and a Salifert kit:
#2 with Red Sea- 10.2
#1 with Salifert- 8.5
#2 with Salifert- 9.3

Jason tested 2 samples with API kit:
#1- 8
#2- 9

Rich tested 1 sample using two kits:
#2 with Salifert- 9.4
#2 with Red Sea- 9.0 using 5ml test, 9.6 using 10ml test

Andy tested all 3 samples using API kit:
#1- between 6-7
#2- between 8-9
#3- 7

Thank you to all who participated.
IMO it shows that while not all results were the same using different kits the results were relatively close to one another in most cases.

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 Post subject: Re: WRS Test Kit Survey
PostPosted: Tue Nov 22, 2016 11:01 pm 
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Also just for fun I tested 2 samples using Tetra "Easy Strips"
Image

You go by a color on the strip and compare on a chart but the chart has large jumps in the two "ideal" ppm colors, one is 180ppm (10 dkh) and the other is 300ppm (16.7dkh).
#1 and #2 samples tested out in the "ideal" range.

While I cannot recommend the strip type test IMO it would be better than nothing perhaps for someone just starting out.
If you were in that situation it would be better IMO to take a water sample to a LFS or fellow reefing friend with test kits and have them test it for you.

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 Post subject: Re: WRS Test Kit Survey
PostPosted: Wed Nov 23, 2016 6:10 am 
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Also the ones I did with API kit were done with syringe and different vial vs the standard kit that has inaccurate lines on them for 5ml.


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 Post subject: Re: WRS Test Kit Survey
PostPosted: Wed Nov 23, 2016 8:04 pm 
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There is not enough data to try to draw any conclusions about any of the kits but there are a couple of things that I noticed. I would have expected the results from the Hanna checkers to be much closer than they were. That is the one method that should minimize differences between operators. I'm not sure, but I think one of the checkers was the ppm version and the other was the dKH version but that shouldn't make any difference in the results. I also noticed that the 2 people using the Red Sea kits seemed to have some trouble in determining the end point. I have also noticed this when using this kit. I have had much better success using a 5 ml. sample instead of the 10 ml. in the instruction and multiplying the result by 2. The end point seems to be a bit easier to see and I have had more success getting consistent results when using 5 ml. of sample. I think this was a fun and educational exercise and look forward to the next one.


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 Post subject: Re: WRS Test Kit Survey
PostPosted: Sat Dec 10, 2016 7:17 pm 
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Location: Sheboygan
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