Possible algae problem

Newdude said:

It's a priority thing when people can't be bothered with it.

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As the old saying goes, “There is never enough time to do things right, but there is always enough time to do them twice. Or thrice.”

I wanted to ask a quick follow-up question here... My FC dropped down to 10 as of today, so I got some numbers using my TF-Pro Salt test kit:

FC: 10
pH: 8.0
TA: 80
CH: 425
CYA: 40
Salt: 3200

Here were the numbers just before I started the SLAM:

FC: 3
pH: 7.2
TA: 80
CH: 450
CYA: 70
Salt: 3200

How did CYA go from 70 to 40 in just over a week? I didn't think that was possible, especially since I didn't drain any water. I added a small amount to account for some evaporation, but it was less than an inch. During the SLAM, I added no chemicals except liquid chlorine as needed to keep FC at the recommended level of 28 (since CYA was 70 when I started the SLAM). Is 10% liquid chlorine capable of reducing the CYA that much? I didn't think it was. I will confirm with another CYA test tomorrow and add more if necessary, but I'm really baffled here. Is it possible that the algae in the water was affecting my CYA test results?

Okay, I did another CYA test today, following the referenced article. It is still at 40. I’ll go ahead and add CYA, 10 ppm at a time, until I hit 60-70.

One of two things has to be true… Either my previous reading was inaccurate, or I should call a patent attorney and start looking at real estate listings in Tahiti because I discovered how to lower CYA without draining water.