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Lauren B.
03-03-2007, 05:07 PM
Does anyone else have this experience with their API test kit?

Do your test results never really get as dark as the colors on the card?

For example, when initially setting up my aquarium, I added in a boatload of ammonia, 7cc's for a 6-gallon tank. Looking back I now know it was too much ammonia, but my test results color didn't indicate this. While I'm sure my ammonia levels were way up toward the 8.0/high end of the scale, the color never developed past medium-kelly green (which indicates 2.0-3.0). It always stayed medium-kelly, but just got deeper and more concentrated in color, but not darker. The color got less thin-looking, less diluted-looking, but mostly stayed within the same hue and never really got any darker.

This is happening on my nitrites test too. I know they're rising each day. However, the test results stay in the purple range and continue to get a deeper, thicker (if you will) purple each day....but it never gets to the full-blown pink/fuchsia that the chart indicates. The only really obvious color change I can claim is when the levels go from 0 to the next color block up.

Has anyone else gone through this...or am I the only person with a weird kit? And before anyone asks (cause I know you will), the test is fresh and not old, I do my readings exactly as instructed in the manual (correct # of drops, correct shaking time, correct waiting time), not in direct sunlight, not in the freezing cold, my vials are cleaned thoroughly after each reading, I used real, pure, 100% ammonia and I didn't substitute cat pee, I'm not colorblind, etc. I follow all directions to the tee and if there's ever a question I always come here and ask you guys.

I read somewhere that Red Sea's test kit is not-so great because their color card is too close in color and it's hard to distinguish level differences. I'm wondering if that is the norm for testing, and perhaps API just exaggerated their card colors a little to make it seemingly easier to distinguish.

xoolooxunny
03-03-2007, 06:41 PM
I have a master test kit from API as well. I can never really match up the colors exactly unless they are on the low end. towards the middle, i just have to go into the bathroom (closest area with bright, white light) and match it up as best i can.

Anyone else? Or do lauren and I have the only 2 weird API test kits?:ezpi_wink1:

newt0524
03-03-2007, 09:19 PM
hey

like food, test kits can go bad and if they had been sitting in your lfs for a while, this may have happened.

I have no expierience with api kits, but I use a nutrafin kit, which has an expiry date on the bottom, so i can always find a good one.

newt

Lauren B.
03-03-2007, 11:41 PM
like food, test kits can go bad and if they had been sitting in your lfs for a while, this may have happened.
<<And before anyone asks (cause I know you will), the test is fresh and not old >>

Amazingly, I am psychic. Call me The Great Lauren-dini.

Lauren B.
03-03-2007, 11:52 PM
I have a master test kit from API as well. I can never really match up the colors exactly unless they are on the low end. towards the middle, i just have to go into the bathroom (closest area with bright, white light) and match it up as best i can.

Thank you for validating that it's not just me! :11:

I thought my problem might have been that I have too much light because all my readings look too light in color. Like you though, the only thing that is definite is the lowest (zero) reading.

jeffs99dime
03-04-2007, 02:05 AM
i've never had any problems with api. i've been using their test kits for years. i recommend api. can you tell? lol

cocoa_pleco
03-04-2007, 02:08 AM
ditto. You must have got a old or weak test kit.

Chrona
03-04-2007, 02:25 AM
I still think whoever thought of comparing a see-through vial (round no less, which screws up the light even more) to a color chart printed on paper wasn't thinking right. At the VERY least, they could have made square testing vials so the light doesn't darken at different angles. I'm beginning to get pissed off at my pH test kit because I can't tell if it's a 6.4 or a 6.8. Next time, I'm getting those 5 in 1 test strips. At least they compare a flat, opaque surface to another flat opaque surface.

jeffs99dime
03-04-2007, 02:30 AM
I still think whoever thought of comparing a see-through vial (round no less, which screws up the light even more) to a color chart printed on paper wasn't thinking right. At the VERY least, they could have made square testing vials so the light doesn't darken at different angles. I'm beginning to get pissed off at my pH test kit because I can't tell if it's a 6.4 or a 6.8. Next time, I'm getting those 5 in 1 test strips. At least they compare a flat, opaque surface to another flat opaque surface.


strips aren't very accurate

Chrona
03-04-2007, 02:35 AM
strips aren't very accurate

Neither are my eyes apparently :)

I'll take my chances

Chrona
03-04-2007, 02:39 AM
i was just pointing that fact out. go for it

Thanks for the heads up though. I'm gonna try out the kind that my LFS uses and report back :)

slinky
08-20-2007, 08:25 PM
This is a great thread. It's very difficult to tell the actual color because a liquid and varied lighting will always produce something different than print on a page. Eventually I've gotten better at approximating what it should look like based upon how it should look in the water as I've seen varying degrees of each level, e.g. ammonia when it's a bit yellow green to darker green to forest green, etc. I hate it. Wish there were electronic kits that did the readings at a reasonable cost and did ammonia and ph and broke down the water. :)

A340
08-20-2007, 08:48 PM
At the VERY least, they could have made square testing vials so the light doesn't darken at different angles.
There are test kits available swith square vials, not sure which one it is though.

freshwaterfishlover
08-20-2007, 08:58 PM
Never had a problem.

Delphin
08-30-2007, 06:40 PM
great thread.

I got the same kit
hold it vertically, 8" away from a white surface etc.
instructions are not too clear.

mine seems to work well so far, but I know what you mean.
I think I need to see different readings to know the differences in color.

I saw the LFS had bad strips last night givnig different reading each strip.

I think tonight I'll add some ph down to a sample vile then test to see if the colors change, or actually I think I can set up the test vial then add one drop at a time to see ph color change. Its blue now 8.0 too high and I'm trying to get it down. green I think.

SkarloeysMom
08-31-2007, 02:55 AM
I posted on this subject in the Tech forum not too long ago. I've had problems with API test kits too. I recently bought a replacement for the Nitrate test and got a totally bunk kit. I think it was just really old. The reagent does not give any reading at all. I emailed API with the lot number to find out when it was produced and never got a response.

I've also found reading the test to be somewhat difficult mainly because my test looks so much lighter than the card. I usually hold the test about a half inch away from the card and read it with natural light.

My master kit is over a year old now and I can tell that its getting old because the test used to look darker like the card and now they're really light. There's no expiration date on the master test kit I got.

I've been wondering about trying the test strips too. My reasoning is that they probably start out pretty accurate but degrade over time. I would think if you just buy the smallest amount you can that they wouldn't be around long enough to degrade. I really don't test that much accept when setting up a new tank or making changes to an established.