I wouldn't worry too much about the TA right now. Focus on getting your pH to stay above 7.2.

And, if you haven't added polyquat, DO SO TODAY.

Because copper may still be present, we can't (shouldn't) run the chlorine up high again. But because it may NOT be present, we can't count on it to control the algae. You can use polyquat to bridge the gap, and keep your pool algae free while we get rid of the copper. It will ALSO help you filter stuff out, like the debris you're having.

Borax note: borax can be slow to dissolve, but your pool water will hold WAY more borax than you have added. If it's borax, vacuum it up, and it will dissolve. If it's not borax, vacuum it up and then clean your filter.