Is anyone able to give advice on how to test for CYA consistently and accurately please?
I tested my CYA level a couple of weeks ago, and again a few days ago and it was showing as just below 30. I tested it with my back to the sun (it was a little cloudy with the sun peeking through) and held the tube at waist level. I did this numerous times as I was surprised the CYA level had dropped so much from 60, which it had held steady at since April.
Prior to this, my CYA had held steady at 60 since April. I was confused that it had reduced so much to less than 30 as we hadn't filled the pool up to dilute it, and I had thought you didn't lose CYA unless it is diluted in some way (significant rainfall or draining and refill).
I tested my CYA this morning again this morning and it was 40. I tested by standing with my back to the direct sunlight and holding the tube at waist level. So still less than the 60 it had held steady at for so long. We did top up the pool yesterday but I still don't think this would have explained the drop from 60 to 40.
This got me thinking about optimum conditions for testing CYA, and how I can ensure my tests for CYA are accurate.
We don't have full sunshine (probably most of the year!) and so how can I ensure my tests are consistent if I can't have the same sunshine conditions?
I'm slamming at moment, and it's taken just over 2 weeks already, but I was working on a target slam level of 12 instead of 16 based on my CYA level of less than 30! No wonder we weren't getting anywhere much, although last night FC only dropped 1.5
Anyone give advice on how best to do this test so that I can be sure my FC levels are as they should be? The more I try to make sense of my readings, the more confused I am getting
I tested my CYA level a couple of weeks ago, and again a few days ago and it was showing as just below 30. I tested it with my back to the sun (it was a little cloudy with the sun peeking through) and held the tube at waist level. I did this numerous times as I was surprised the CYA level had dropped so much from 60, which it had held steady at since April.
Prior to this, my CYA had held steady at 60 since April. I was confused that it had reduced so much to less than 30 as we hadn't filled the pool up to dilute it, and I had thought you didn't lose CYA unless it is diluted in some way (significant rainfall or draining and refill).
I tested my CYA this morning again this morning and it was 40. I tested by standing with my back to the direct sunlight and holding the tube at waist level. So still less than the 60 it had held steady at for so long. We did top up the pool yesterday but I still don't think this would have explained the drop from 60 to 40.
This got me thinking about optimum conditions for testing CYA, and how I can ensure my tests for CYA are accurate.
We don't have full sunshine (probably most of the year!) and so how can I ensure my tests are consistent if I can't have the same sunshine conditions?
I'm slamming at moment, and it's taken just over 2 weeks already, but I was working on a target slam level of 12 instead of 16 based on my CYA level of less than 30! No wonder we weren't getting anywhere much, although last night FC only dropped 1.5
Anyone give advice on how best to do this test so that I can be sure my FC levels are as they should be? The more I try to make sense of my readings, the more confused I am getting