CYA didn't increase?

[cbach]

Being that I decided to continue with SWG and am waiting for the new cell to arrive, I wanted to get my CYA up from ~50-55 to ~70-80 in preparation. I added 4lbs of pre-dissolved cyanuric granuals 5 days ago and have run constantly since, but testing still shows the same reading. No water loss, FC holding as expected around 6 with loss of about 2 a day, no CC, PH high today from a lot of use/kids in it all day yesterday, TA 90. Any idea why it wouldn't have raised as expected?

 

[Scuba_Steve]

How are you testing? What do you mean by "pre-dissolved"? Did you do this in a bucket or something, or use liquid CYA? How many gallons is your pool?

 

[cbach]

Yes, in a bucket with pool water, then into skimmers a little at a time. 22k gunite. Testing with TF 100 kit.

 

[jblizzle]

Well,
1. you are not sure when it is all truly dissolved in the filter. It would not have dissolved much in the bucket ... really made a slurry I would think.

2. Testing error? Were both tests done in the same lighting conditions? The test is +/- 15ppm, but if conditions were the same, I would have expected you to see at least some rise.

 

[cbach]

Yes, mostly a slurry, but would hope a few full days of pump running would dissolve it. Testing done in same light and as exact as possible with this kit....maybe my eyesight has gotten better during the week I'll just give it a little longer and see what it does.

 

[Scuba_Steve]

Next time add the CYA to a sock and place it either in front of a return or in the skimmer. (return preferred)

You added an unknown variable by doing the bucket method. It still should have risen, so your guess is as good as mine...