Lamotte 3110 vs 3354 - The Planted Tank Forum
 
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post #1 of 8 (permalink) Old 01-10-2005, 09:28 AM Thread Starter
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Lamotte 3110 vs 3354

I did a little reading on here tonight. I'm about to buy my test kits for nitrate and phosphate.

Seems MOST folks are happy with their Red Sea kit for testing phosphate, but the Red Sea kit for nitrate isn't so great.

So I'm considering buying the Red Sea for phosphate and perhaps a Lamotte kit for nitrate. Marinedepot.com sells the Lamotte 3110 kit for 43.99 which seems like a competitive price. My question is, whats the difference between the Lamotte nitrate kit #3110 and #3354. Just different reagents? Do both test provide abuot 50 tests? Can refills be bought for both units? I'm thinking of going with the 3110.

As an aside, people also seem to have good things to say about the AP kits for nitrate, for those of you wondering about a cheaper nitrate alternative
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post #2 of 8 (permalink) Old 01-10-2005, 01:48 PM
 
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Lamotte lists 2 as you mention, and there is also 3119

The differences

3110 50 Tests, Octet Comparator calibrated to 0.25, 0.5, 1.0, 2.0, 4.0, 6.0, 8.0, 10.0 Instructions http://www.lamotte.com/pages/common/...truct/3110.pdf

3119 50 Tests, Octa-Slide calibrated to 0.25, 0.5, 1.0, 2.0, 4.0, 6.0, 8.0, 10.0 ppm Instructions http://www.lamotte.com/pages/common/...truct/3319.pdf

3354 40 Tests, Octa-Slide calibrated to 0, 1, 2, 4, 6, 8, 10, 15 ppm. Tablet Method, no powders to measure. Instructions http://www.lamotte.com/pages/common/...truct/3354.pdf

I find the Octet Comparator easier to read then the Octa-Slide, being as the Octet allows one to compare a test sample to 4 standards at once.
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post #3 of 8 (permalink) Old 01-10-2005, 04:27 PM
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I have the 3110, and I know that it gives N values, so to calculate NO3, you multiply by 4.4. If the same is the case with the 3354 kit, then you can only get a couple of data points below the typical 10 ppm of NO3. If that is the case, I would go with the 3110. Actually, I guess I already did .
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post #4 of 8 (permalink) Old 01-10-2005, 07:29 PM Thread Starter
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and you just buy refills for the 3110. Not another whole test at full price?
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post #5 of 8 (permalink) Old 01-10-2005, 09:18 PM
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I haven't had to purchase a refill kit yet, but, yes, I am assuming I can find a place to just purchase the reagents when I use mine up. I seem to recall reading the refill kit should be in the $10-$15 range.
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post #6 of 8 (permalink) Old 01-11-2005, 02:29 AM
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You just buy the refills for the 3110.

I believe the difference between the kits is the means of sample to level comparisons.

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post #7 of 8 (permalink) Old 01-16-2005, 08:16 PM Thread Starter
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just quick follow up


In the instructions included with my Lamotte 3110 kit it reads:

"Nitrite interferes at all levels. Use the following equation to compensate for nitrite interferences:

Test result (ppm) - (Nitrite-N (ppm) x 5.5) = true Nitrate-N reading"

Anyone else notice this? Is this something I need to consider?

thanks
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post #8 of 8 (permalink) Old 01-17-2005, 12:20 AM
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Hopefully you won't have to worry about Nitrite interference... Nitrites should be zero!


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