I think I have the same problem. My pool has been green for over a week now and nothing would clear it.
By chance I came across your great site and did all my readings. Guess what all was fine apart from CYA at 68.
I drained nearly half the pool and got it down to 45 then poured in 20 litres of javel (liquid bleach). Today the pool is blue but a little cloudy.
But I'm getting there.
Thanks so much for a great site.