^1st MAJOR pool fight over, finally. Took 3 vacuum to waste,
  with refill, reshock, particles settle down inbetween. Took
  about 3 days. The difficulty? Dead algae making the pool cloudy
  and excess CYA ("sunshine protection"). Todays vacuum contained
  almost Nothing on the bottom. I'm doing the final refill, but I
  think this should do it. After this, regular maintenance should
  keep it clear.^