Tetratest Laborett Test Kit Review

SchizotypalVamp

The REAL AC Mafia
Mar 18, 2008
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California
The Box
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The Testing Bottles/Packaging:
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A neat tray. Notice the handy syringe which I will also be using for ferts/ It is much less frustrating than manually filling the tubes, and also starts my drip acclimater.
There are no nitrate or high range PH testers, but there are KH, GH, and a saltwater PH tester.
The square plastic vials are not nearly as easy to break as glass vials and are easier to fill manually, thanks to corners.
The largest bottles in this kit are 20mL, whereas the API bottles are all 37 mL. You also have to use just as much reagent, if not more, to test. So this kit will go faster than the API.

The Color Scales:
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The PH tester tests from 5.0-10.0 with a gradient of .5, though it jumps from 5.0 to 6.0 and from 9.0 to 10.0. The API test kit tests from 6.0 to 8.8 with a .2 gradient, except where it jumps from 6.0 to 6.4 and 8.4 to 8.8.

Tetratest:
5.0, 6.0, 6.5, 7.0.....8.5, 9.0, 10.0

API Master
:
6.0, 6.4, 6.6, 6.8......8.2, 8.4, 8.8

The API is more precise, but the Tetratest has a wider range.

The nitrite tester starts at 0.3 mg/l, with a gradient of .5 mg/l. The bottom of the color chart indicates "3.3-33 mg/l". The API master starts detecting nitrate at .25 ppm and goes to 5.0 ppm.(.25, .5, 1.0, 2.0, 5.0). Both can be used in freshwater or saltwater.

Tetratest:
<0.3 mg/l, 0.3, .8........3.3-33

API Master
:
0 ppm, .25, .5, 1.0, 2.0, 5.0

Both test kits do kooky things. The API is more precise, but keep in mind that the larger ends of the scales are not used very much.
Ammonia:

Tetratest:
0 mg/l, .25 mg/l, 1.5 mg/l, 3.0 mg/l, 5.0 mg/l

API Master:
0ppm, .25 ppm, .5ppm, 1.0 ppm, 2.0ppm, 4.0 ppm, 8.0 ppm

The API has a larger range. Both sort of go kooky at the larger range, though again, knowing the precise amount of ammonia at the higher end of the scale is generally not very useful.

The Instructions:

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These are easy to follow. However, for some tests, you have to use 3 bottles, and the wait for the ammonia is 20 minutes!

Next up: Side-by-side testing with the API master.

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All vials were rinsed with water directions were followed etc etc. Nothing was mixed between the test kits.
1st Comparison Testing:

Ammonia:

Tetratest
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is zero

API
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is zero

Nitrite:

Tetratest
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is zero

API
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is zero

PH:

Tetratest
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API
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7.4 vrs 7.5.

More tests later

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"The API master starts detecting nitrate at .25 ppm and goes to 5.0 ppm.(.25, .5, 1.0, 2.0, 5.0). Both can be used in freshwater or saltwater."

I think you mean nitrIte ;)

Good info schizo. Though I still prefer API myself. Any final verdict?
 
Thanks Jpappy!

IMO, the tray is packaged better than the API, and the syringe is a nice and useful touch. I also think the vials are much more practical, though the API are prettier.
The API gives more exact values, though the lower range of the Tetratest PH has personally come in handy, and the spread of the Tetratest values are not far appart. The tetratest is more annoying to test with, as it requires more steps, and the wait for the ammonia is excessive. You also get more chemicals with the API master.

As you can see from my test, in practice, the API gave a more exact PH reading. I am going to fully test my Malaysian biotope tank and the bucket, which should give an idea of how readings differ or if they differ in a way that matters in practice.
 
Testing the Malaysian Biotope

Ammonia:
Tetratest: A flat zero...need to retest
API: A little less than .5

Nitrite:
Tetratest: Little less than .3mg/L, but definitely there and noticeable
API: less than .25, but is just a dirty color I might not notice

PH:
Tetratest: a little more than 5.0
API: 6.0, though lighter than the usual color.

What have we learned?
Either I tested badly or the Tetratest is much less sensitive to ammonia than the API, though I'm not going to jump to conclusions before retesting.
On the other hand, it is definitely more sensitive to nitrite
The wider PH scale really helped me out here, but this is not a PH you should usually need to test for.
 
I agree, it's an annoyance. However, you can easily buy a nitrate kit, and it costs less than getting a KH and GH kit. For some reason Petco & Smart don't sell GH kits, at least around here. My LFS does, but it was only 10 more dollars to buy this entire kit, which is how I ended up with it in the first place.
 
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