If the sample turns cloudy when you add R-0001 it means you have a fairly high calcium level. The cloudiness should go away when you add R-0002 and the test results are still valid.
JasonLion said:You use the acid/base demand test to calculate how much acid or soda ash you need to add to the pool to change the PH by a given amount. We use the Pool Calculator to figure out the same thing, without having to do the acid/base demand test.
The pH comparator should not be 5 shades of red. That would be the DPD chlorine test comparator where you should instead have a FAS-DPD chlorine test where you count the drops. You shouldn't have any shades of red comparator in your TF-100.vk said:If only something could be bold differences between colors instead of 5 shades of red
If you are using the large view tube and know that your CYA level is at least 50, you can use half as much pool water and half as much R-0013 to save on reagent.