I have a green swamp. Not real bad, you can see the bottom in the shallow end. Before finding this site, over the winter I had dumped trichlor into the pool every month or so to try and keep the algae away. So now, I have my test kit and the CYA test is way over 100. Only got a half inch of drops in before the black dot disappeared.
I'm going to run it again, filtering the water through a coffee filter and letting the water get room temp. Right now it's 50 F.
Am I right to assume using trichlor has my CYA this high? And should I replace 25% of the water per The Pool Calculator?
Thanks for your help and this site!