Just an update....

The hose filter that I bought did NOT work. Caveat emptor, indeed.

So, now I have lovely green water again, and I have to start the whole process over again

I have lowered the chlorine, and will start the metal treatment again today.

By the way, when I went to the pool store to get the metal treatment, the lady there was insisting that my ph was fine, and that the higher it was, the better for the metal treatment?? (my ph is 7.5, by the way)

I tried arguing with her, and telling her that the ph should be 7.2, but she was quite nasty and rude, so I just left. Time to find a new supplier, I think