pH testing
- Thread starter jlfnjlf
- Start date
dots
Premium Member
http://en.wikipedia.org/wiki/Accuracy
John,
This is one of the main reasons I went to a two part system....Ca reactors are kinda finicky to get tuned/keep tuned. Is it varying or stable with those values?
You may want to review the above link and review precision and error of testing to explain the variances.
There are a lot of reasons for the differential: old tests,not calibrated, poor accuracy, repeatability, and precision can all lead to these differences.
Which one to trust?........I think a calibrated Ph meter would be the best......dont you have a controller, I thought you do?.......I would hook the controller up to the reactor and regulate it that way.
In the end though, I have seen a lot of tanks vary a little from 8.2 and as long as they are stable is the big thing.
FWIW, I think if preformed correctly the Salifert kits I have used are very accurate and trustworthy provided they are not expired.
John,
This is one of the main reasons I went to a two part system....Ca reactors are kinda finicky to get tuned/keep tuned. Is it varying or stable with those values?
You may want to review the above link and review precision and error of testing to explain the variances.
There are a lot of reasons for the differential: old tests,not calibrated, poor accuracy, repeatability, and precision can all lead to these differences.
Which one to trust?........I think a calibrated Ph meter would be the best......dont you have a controller, I thought you do?.......I would hook the controller up to the reactor and regulate it that way.
In the end though, I have seen a lot of tanks vary a little from 8.2 and as long as they are stable is the big thing.
FWIW, I think if preformed correctly the Salifert kits I have used are very accurate and trustworthy provided they are not expired.
Last edited:
MrMikeB
New member
I found as long as the Ph is within 'range' but stays consistent, that is more important than the actual value itself. As long as you isolate your variables by using the same tests, same method, similar time of day, etc. and to a point where you are getting good consistent data, you are golden!
jlfnjlf
New member
dots,
Thanks for the link...
I have a Milwaukee controller running the calcium reactor and I have a AC Jr waiting for the new tank I am setting up. I may pull the Milwaukee probe from the reactor and drop it in the tank for a few minutes.
The tank looks healthy, so I am not going to stress out. I was stressed at first by the readings I was getting from this meter, but I am confident that it has an issue. I think this is prime case of you get what you pay for it was like $20 delivered on eBay.
I am still intrigued by the variance in results from the test kits. This is another point for using extreme caution with adding stuff to the tank to fix a problem. A problem that could merely be a perceived problem and not an emergency as one might think.
John
Thanks for the link...
I have a Milwaukee controller running the calcium reactor and I have a AC Jr waiting for the new tank I am setting up. I may pull the Milwaukee probe from the reactor and drop it in the tank for a few minutes.
The tank looks healthy, so I am not going to stress out. I was stressed at first by the readings I was getting from this meter, but I am confident that it has an issue. I think this is prime case of you get what you pay for it was like $20 delivered on eBay.
I am still intrigued by the variance in results from the test kits. This is another point for using extreme caution with adding stuff to the tank to fix a problem. A problem that could merely be a perceived problem and not an emergency as one might think.
John
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