We have a salt water pool and are in our third year of ownership. We just opened the pool for the summer months and I have things pretty well under control I think. I test PH daily and this year I find that the color in the comparator creeps darker - higher ph - as the water sits in the vial. For example, this morning upon adding 5 drops of R0004 and inverting the comparator to mix, the reading was 7.4, but within a few seconds it read 7.6, and in less than a minute was around 8. I received my new replacement vials from TFtestkits.net last week so my reagents are fresh.
So the question is, what am I doing to cause this? Is it normal? If it is normal (and I just haven’t noticed it before) when would the most accurate reading be?
A further piece of information: about a week after opening the free chlorine was about 17.6. I left the cover off for a couple of days and fc is now just above 7.
I apologize if this has been discussed previously. I did a search and didn’t come across anything
So the question is, what am I doing to cause this? Is it normal? If it is normal (and I just haven’t noticed it before) when would the most accurate reading be?
A further piece of information: about a week after opening the free chlorine was about 17.6. I left the cover off for a couple of days and fc is now just above 7.
I apologize if this has been discussed previously. I did a search and didn’t come across anything
