The background:
For reasons that have not yet been determined, the output of my SWG failed and the FC went to 0 sometime during the week. The obvious surprise consequence was a cloudy pool the following weekend, so I hit the turbo boost on the cell and tossed in about a pound of dichlor that's been sitting in the shed for about 3 years just to get the whole thing kick started again- very unscientific guess. My CYA last year was about 40 and I don't have any reason to believe that it changed (maybe dropped a little), so I didn't replace the testing reagents when they ran out- I wasn't too worried about the dichlor adding a bit more CYA.
The problem is that now when I tried to test for FC, I get .4 but if I wait a minute, the sample turns pink again on it's own. I added another drop or two and it went clear, but a minute later it was pink again. This continued until I gave up w/ FC at 2.0. The expiration dates on my reagents are all June 2019 and they were stored carefully. With these unclear results, I don't really trust what my FC and CC levels are. Why is this happening? Is it the old Dichlor?
For reasons that have not yet been determined, the output of my SWG failed and the FC went to 0 sometime during the week. The obvious surprise consequence was a cloudy pool the following weekend, so I hit the turbo boost on the cell and tossed in about a pound of dichlor that's been sitting in the shed for about 3 years just to get the whole thing kick started again- very unscientific guess. My CYA last year was about 40 and I don't have any reason to believe that it changed (maybe dropped a little), so I didn't replace the testing reagents when they ran out- I wasn't too worried about the dichlor adding a bit more CYA.
The problem is that now when I tried to test for FC, I get .4 but if I wait a minute, the sample turns pink again on it's own. I added another drop or two and it went clear, but a minute later it was pink again. This continued until I gave up w/ FC at 2.0. The expiration dates on my reagents are all June 2019 and they were stored carefully. With these unclear results, I don't really trust what my FC and CC levels are. Why is this happening? Is it the old Dichlor?