OK,
pH seems to have settled in at 7.6 and I have the Alk to 110. As to the pump/filter being matched; I have a Hayward GM152 sand filter with a Haward UN series 1hp pump. Not sure if this is a good match or the filter good enough for a 12,000 gallon pool. It was all given to me last year.

Still hazy but getting better...

Wayne