All my research keeps leading me to posts on this website so here goes.
Detail of pool and chemicals are below in the signature.
Opening the pool for the season and since chlorine was down we, my local pool store and I, decided to treat some iron stains with Stain Free and Pro Team Metal Magic.
Let it run 2 days and then 2 shocks. The green that was there from opening the pool cleared but it is still cloudy. We have cleaned the filter several times including at least twice with Pro Team Filter Magic.
My local pool store likes these targets: PH min 7.2, target 7.4-7.6, max 7.8, Alkalinity min 150, target 150-240, max 250, Calcium or Hardness target 175-275, CYA target 40-50, Combined chlorine min is 0, target 0, max is 0.2, Free Chlorine and Total Chlorine target 3-5.
I took a water sample to another pool store and he said my Alkalinity and PH were off the chart and told me to add mercuric acid.
I double checked with my local pool store and they said the PH and the Alkalinity were ok and that my Chlorines were binding up and to use 8 bags of ProTeam shock and swim. They said the mercuric acid was a suggestion of hardware store and would throw everything out of wack. Since my Aquacheck test strips seem to indicate to me more in the line of my local pool store I tried their recommendation and stayed away from the mercuric acid. I put the shock and swim in on Friday night and today it is still cloudy with still no free chlorine and all the other levels look ok.
The local pool store now wants us to bring in water for a filter check. We bought the filter last August and clean it twice a week and also use the Pro Team Filter Magic
8000 gal, IG, Fiberglass, Jandy CS 200 Cartridge Filter, new filter August 2011
CH 400, PH 7.6, TA 180, CA 200, CYA 0, Free Chlorine 0, Total Chlorine 3-5