Ok, I finally got my TF-100 kit.
My first set of readings:
FC - 1 (used basic kit for now)
Ph - 7.5
TA - 100
CH - 270
CYA - 110 (was about a 1/16 in. below the 100 mark, so recorded this as 110)
So I'm low on chlorine, slightly high on TA.
But if I understand correctly the CYA is out of control. This pool had been used for years before I moved in with tablets, so I'm not terribly surprised. (I've been doing BBB) I have a little bit of algae, and I noticed my chlorine doesn't seem to be killing it. I wondered if this was going to be the problem. (oddly enough, I had gotten a reading from the pool store a while ago and they thought their reading of 125 was find and dandy, no problem)
So, I had hoped to SLAM the pool before closing in a couple weeks to get rid of the algae. But I'm not sure how to do that with this high CYA. On the other hand, according to the calculator, I'd have to drain over half the pool in order to get it down.
What would you recommend? Should I drain way low for closing so snow and rain can help refill it, hopefully starting the spring with a lower CYA even if the water's not sparkling clean and may have algae when I lift the cover?
Off topic, but when the CH test water turned blue, there were what looked like little red dots swirling around in it. I wasn't sure if that was when I should stop the test and record the results, but I did. Was that the right way to do it?
Any help and advice, as always, is greatly appreciated.