Quick question, I watched a youtube video showing how to perform the calcium hardness test, which ask to fill the water to the 25 ML mark not the 10 ML mark as the directions on the TF-100 kit. Also it ask for 20 drops of R-0010 instead of 10 drops and 5 drops of R-0011L instead of 3 drops. Why? I understand that is a matter of ratios, but the ratio seems to be off, as if 10 ML requires 3 drops, 25 ML shall require more than 5 drops as 25 ML is more than double 10 ML so it shall be the drops required to perform the test correctly. I know I shall trust the TF-100 kit directions over a youtube video, but just wanted to confirm just in case.
Tf-100 calcium hardness test
- Thread starter RESISTENCIA13
- Start date
Either way is fine. There is no need to have more precision that 25ppm in most cases, thus the TF-100 recommendation.
The ratios of the reagents does not really matter. You can actually use as much of the die reagent you want to have deeper colors.
The ratios of the reagents does not really matter. You can actually use as much of the die reagent you want to have deeper colors.
If you have astronomical CH, as I do, the smaller sample saves a huge amount of reagent and time. If I used the large sample and had to swirl it manually instead of using the speedstir, I'd look like Popeye now.
I see. One more questions when looking at the tube. Do I look at the color change from the top and through the side? I notice the colors look difference based on the angle you looking at.
I've only ever looked through the side while it's sitting on the patio table on the speedstir in front of me. It'll be sky blue. About this color
It does not matter what the final color is. Always add drops until the last one causes no further color change and then do not count that drop.
That's true. I know from experience that when CH is astronomical, it will sit at Indigo for quite a while before it goes blue. That's why I mentioned sky blue.
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