I'm about 6 weeks in to pool ownership and TFP ways. In order to give myself some confidence in my testing I ordered the standard solution samples. pH and TA are spot on, CYA I'm reading 40 instead of 50 but found several threads on this and tips for lighting, etc. so I will try that one again.
But, the CH test is way off. I'm measuring 375 (15 drops) on the 200ppm standard solution. For my pool I read 625ppm so now don't know what to believe. I ordered the test kit back in December so nothing should be old or bad. Any ideas what could cause such a discrepancy?
But, the CH test is way off. I'm measuring 375 (15 drops) on the 200ppm standard solution. For my pool I read 625ppm so now don't know what to believe. I ordered the test kit back in December so nothing should be old or bad. Any ideas what could cause such a discrepancy?