So,
I know this is an issue but I don't know how much of an issue and when.
From what I recall, if your fc is above 10ppm the pH measurement will not work correctly. Is this true?
My fc measured 8.2ppm last night and I checked my pH 4 times and all 4 times it came up high.
I'd call it purpl-ish red, or above 8. More purplish than 8 for sure.
The last time I checked it, it was running between 7.6 and 7.8 but not quite 7.8, so I added a few swig's of acid and let it sit for about a week. Since then we've had about an inch of rain. I knew I wanted to bring it down a hair, but not much. All summer it ran a solid 7.6 but I recently added some water so I expected it to go up a tad which is what the slight climb was from but it seemed to stop just under 7.8.
Now it's either reading off the scale some how, or, the fc of 8.2 is skewing it. I also tried adding a drop of R-0007 Thiosulfate and that seemed to have no effect. I can't imagine it's above 8 after I added acid and it wasn't even 7.8 last time.
Is 8.2 fc high enough to cause a slight issue, or is my test legitimate?
I know this is an issue but I don't know how much of an issue and when.
From what I recall, if your fc is above 10ppm the pH measurement will not work correctly. Is this true?
My fc measured 8.2ppm last night and I checked my pH 4 times and all 4 times it came up high.
I'd call it purpl-ish red, or above 8. More purplish than 8 for sure.
The last time I checked it, it was running between 7.6 and 7.8 but not quite 7.8, so I added a few swig's of acid and let it sit for about a week. Since then we've had about an inch of rain. I knew I wanted to bring it down a hair, but not much. All summer it ran a solid 7.6 but I recently added some water so I expected it to go up a tad which is what the slight climb was from but it seemed to stop just under 7.8.
Now it's either reading off the scale some how, or, the fc of 8.2 is skewing it. I also tried adding a drop of R-0007 Thiosulfate and that seemed to have no effect. I can't imagine it's above 8 after I added acid and it wasn't even 7.8 last time.
Is 8.2 fc high enough to cause a slight issue, or is my test legitimate?