Calcium Test Kit Readings

i like saliferts, it works ok, but color charts always have a problem.
sound like salifert is your best bet however. it does the WHAM change from
pink, to blueish, and it is assumed that the WHAM change it what is to be
assumed the measure point. others wonder if you keep dropping solution
until its totally clear blue, which in my opinion will give inaccurate
results. Im not sure about sea chems, but saliferts is GOOD.

wolfhedd

"Pszemol" wrote in message
...
"Pszemol" wrote in message
...
I am using SeaChem calcium test and they also use titrate method.

http://www.drsfostersmith.com/Produc...133&in_merch=1
The point the measurment is ended for SeaChem test is when the color of
the
sample turns blue (originaly pink). The transition is rapid (one drop or
less).
You may note the amount you added and add more - if the coloro does not
change
the noted value is your reading.

Here you will find *.pdf file with complete, original instructions:
http://www.seachem.com/en_support/ki...40-Calcium.pdf

I use and like the Seachem test kit. As others have said, it's a titration
style kit meaning that you add drops until the colour changes. My experience
is that the colour change is rapid and distinct with this kit. Plus, the kit
supposedly lasts for 150 tests (I've only used it about 6 times so far). The
kit also comes with a standarized calcium solution so that you can test its
accuracy. I tried that, and it was bang on.

Don't know about the Salifert kit for calcium, but the Seachem has my vote.

Regards,

Dave.

"wolfhedd" wrote in message
nk.net...
i like saliferts, it works ok, but color charts always have a problem.
sound like salifert is your best bet however. it does the WHAM change
from
pink, to blueish, and it is assumed that the WHAM change it what is to be
assumed the measure point. others wonder if you keep dropping solution
until its totally clear blue, which in my opinion will give inaccurate
results. Im not sure about sea chems, but saliferts is GOOD.

wolfhedd

"Pszemol" wrote in message
...
"Pszemol" wrote in message
...
I am using SeaChem calcium test and they also use titrate method.


http://www.drsfostersmith.com/Produc...4397&N=1+11313
3&in_merch=1
The point the measurment is ended for SeaChem test is when the color
of
the
sample turns blue (originaly pink). The transition is rapid (one drop
or
less).
You may note the amount you added and add more - if the coloro does
not
change
the noted value is your reading.

Here you will find *.pdf file with complete, original instructions:
http://www.seachem.com/en_support/ki...40-Calcium.pdf

"David McKay" wrote in message le.rogers.com...
The kit also comes with a standarized calcium solution so that
you can test its accuracy. I tried that, and it was bang on.

Don't know about the Salifert kit for calcium, but the Seachem has my vote.

Does Salifert come with reference sample?

Nope

Salifert relies on distinct colour change, no ref sample required.

Chris

"Pszemol" wrote in message
...
"David McKay" wrote in message
le.rogers.com...
The kit also comes with a standarized calcium solution so that
you can test its accuracy. I tried that, and it was bang on.

Don't know about the Salifert kit for calcium, but the Seachem has my
vote.

Does Salifert come with reference sample?

"Chris Taylor" wrote in message ...
Salifert relies on distinct colour change, no ref sample required.

We misunderstood each other, probably :-)
Reference sample is not "requred" and it is not used
normaly when you do regular test. It is there just for
you to be sure test is working right. In my opinion
it is very big benefit to have the way to verify/calibrate
the test, especialy when it gives some unusual result
on your tank sample.

Salifert is probably based on the same chemical reaction.
I guess it based on tintrate method and color change.
But with time, all chemicals change the content (due to
solven/water evaporation from vials, oxydation with air
temperature of storage) so after couple months passes you
will not be sure if your test is telling you the truth or not.

The reference sample in the test kit stays closed for
the most of the time and it is buffered solution so it
suppose not to change much over time.

If I have to chose the test with or without the reference
sample I will always pick the one with the reference.

You're right, I misunderstood.

In short, no, there is no reference sample in the kit I purchased in the UK.

Regards


Chris



"Pszemol" wrote in message
...
"Chris Taylor" wrote in message
...
Salifert relies on distinct colour change, no ref sample required.

We misunderstood each other, probably :-)
Reference sample is not "requred" and it is not used
normaly when you do regular test. It is there just for
you to be sure test is working right. In my opinion
it is very big benefit to have the way to verify/calibrate
the test, especialy when it gives some unusual result
on your tank sample.

Salifert is probably based on the same chemical reaction.
I guess it based on tintrate method and color change.
But with time, all chemicals change the content (due to
solven/water evaporation from vials, oxydation with air
temperature of storage) so after couple months passes you
will not be sure if your test is telling you the truth or not.

The reference sample in the test kit stays closed for
the most of the time and it is buffered solution so it
suppose not to change much over time.

If I have to chose the test with or without the reference
sample I will always pick the one with the reference.

No, it doesn't container a reference test. The kits are good for one year. Each solution has a serial
number/reference number, so it there is some doubt, it can be double-checked with Habib at Salifert.

Marc

Pszemol wrote:

"Chris Taylor" wrote in message ...
Salifert relies on distinct colour change, no ref sample required.

We misunderstood each other, probably :-)
Reference sample is not "requred" and it is not used
normaly when you do regular test. It is there just for
you to be sure test is working right. In my opinion
it is very big benefit to have the way to verify/calibrate
the test, especialy when it gives some unusual result
on your tank sample.

Salifert is probably based on the same chemical reaction.
I guess it based on tintrate method and color change.
But with time, all chemicals change the content (due to
solven/water evaporation from vials, oxydation with air
temperature of storage) so after couple months passes you
will not be sure if your test is telling you the truth or not.

The reference sample in the test kit stays closed for
the most of the time and it is buffered solution so it
suppose not to change much over time.

If I have to chose the test with or without the reference
sample I will always pick the one with the reference.

--
Personal Page: http://www.sparklingfloorservice.com/oanda/index.html
Business Page: http://www.sparklingfloorservice.com
Marine Hobbyist: http://www.melevsreef.com

But you are buying this stuff from the store, who knows how long do they
kept them on the shelf, or in what condition they transported it...
Did it freeze in the truck? Was it exposed to very high temperatures?
You do not know... The expiration date is not enough. If you want to be
sure the best way is the reference sample you can compare readings to.

Of course it is not a must, but if I have to pick between Salifert Calcium test
and SeaChem Calcium test I pick SeaChem for having the reference
sample. The price for both is the same at www.marinedepot.com :-)

"Marc Levenson" wrote in message ...
No, it doesn't container a reference test. The kits are good for one year. Each solution has a serial
number/reference number, so it there is some doubt, it can be double-checked with Habib at Salifert.

Marc

Pszemol wrote:

"Chris Taylor" wrote in message ...
Salifert relies on distinct colour change, no ref sample required.

We misunderstood each other, probably :-)
Reference sample is not "requred" and it is not used
normaly when you do regular test. It is there just for
you to be sure test is working right. In my opinion
it is very big benefit to have the way to verify/calibrate
the test, especialy when it gives some unusual result
on your tank sample.

Salifert is probably based on the same chemical reaction.
I guess it based on tintrate method and color change.
But with time, all chemicals change the content (due to
solven/water evaporation from vials, oxydation with air
temperature of storage) so after couple months passes you
will not be sure if your test is telling you the truth or not.

The reference sample in the test kit stays closed for
the most of the time and it is buffered solution so it
suppose not to change much over time.

If I have to chose the test with or without the reference
sample I will always pick the one with the reference.

--
Personal Page: http://www.sparklingfloorservice.com/oanda/index.html
Business Page: http://www.sparklingfloorservice.com
Marine Hobbyist: http://www.melevsreef.com