Big Dave ---- His volume is 20K. There was another poster who started up in the middle of this thread who had the 24ft AG pool.

Even still, Dave is right. You added WAY TOO MUCH chlorine! I hope you didn't totally bleach out your liner! With that kind of chlorine level, I can't imagine how you could have any specks of green left anywhere! What was the percent of the liquid chlorine you added 15 gallons of?

I also have a hard time believing that with chlorine taken that high, your cl level could have dropped so much so fast.

Get that CYA reading. Also, let a reputable pool store test your water and then post all the results here.

You need to get some reliable readings.