Test results from 5/31...
These results were from a pool store and agreed with 5 way test strips that I have.
Test results from 6/5
Over the past week or so, I added a ton of bleach (based on the calculator) to clear up green algee.
3 days ago my PH was reading < 6.8 so over the course of the last 3 days I have added around 9 lbs of Borax and the PH is now 7.6.
I have a tri-chlor tabs in an inline chlorinator.
Other than that I've done nothing but brush and vacuum. No one has used the pool and there hasn't been any water loss.
I first tested the CYA with the "black dot vial" test on 6/2. The water was perfectly clear and I could clearly see the black dot. When I tested it today, the water was a little cloudier when viewing the dot, so it looks like I'm getting CYA back in via the tri-chlor tabs.
I understand all my results except the CYA. How could the CYA have dropped from 40 to < 20 that quick with no water loss? That's the only real way to lose significant amounts of CYA correct?
I'm a little confused...