R 0014 not available in Canada

Adamphotoman

Well-known member
Aug 18, 2018
263
Dieppe New Brunswick
I purchased a TF 100 test kit last year from TFTestKits.net through an American friend but with Covid-19 I thought I would try to get local replacements. The FAS DPD was easy but expensive. R 0014 is proving difficult. I first ended up with CR0004 which I returned. No one seems to be able to order in R 0014. TFTestKits won't ship to Canada.

I have been researching possibilities. My Dad is a chemist and my mom is pharmacist. I am comfortable with photo chemistry. Together we came up with this.

Taylor makes their Phenyl Red PH indictor dyes in different strengths so for all intensive purposes they are not interchangeable, but, if indeed the chemical composition is the same except for concentration, then, there are several ways to use the stronger red phenol CR 0004 in the residential comparator block.
1 drop of CR 0004 in a 8.8 ml sample of pool water could theoretically be used, but, this is inconsistent as droplet size will vary.
Therefore; for the most accurate result:
Use 5 drops of CR 0004 in a 44 ml sample of pool water, mix well and then fill the midget comparator block, discard the rest and compare.
The next most accurate is to use 4 drops OF CR 0004 in a 35.2 ml sample of pool water [35ml is close enough].
In both cases the resulting coloured pool sample is poured into the Midget comparator block discarding the rest of the coloured sample.
Note: This only works if the colours on both blocks match up. PH 7.2 and 7.8 are close.
Midget block 5 swatches [ 6.8 / 7.2 / 7.5 / 7.8 / 8.2 ] Taylor K1000 Residential Sure Check comparator
Large Block 6 swatches [ 7.0 / 7.2 / 7.4 / 7.6 / 7.8 / 8.0 ] Taylor K2005/2006 2000 Series comparator 9056
R-9056 .jpg
 
Last edited:

JoyfulNoise

TFP Expert
Platinum Supporter
May 23, 2015
17,224
Tucson, AZ
Sure, all that works fine (it’s just dilutions and volume ratios) but it seems awfully convoluted. Just use the R-0004 with the #9056 comparator block and don’t worry about the R-0014. I find that the larger comparator block works better anyway for swimming pools because no one ever really need the color swatches for 6.8 or 8.2 on the midget block. If your pH is that high or low, then you need to correct it to get the water closer to 7.5/7.6.