We inherited our pool seven years ago but it's now 12 years old. I have my pool co. close it and I've been opening it up to now without any trouble. I opened it this year on May 12th but started with a green-brown mess. Did my usual 1 lbs. of shock (K-Mart trichloro-s-triazinetrione 53.5 % for a total of 48.6% available chlorine) and a puck in each skimmer and got nothing. The following Wednesday I dumped 2 lbs. of the same “shock” and nothing really happened. Friday I added another 3 lbs. and at least got it to turn blue but cloudy. All along I've been back washing my DE filter almost daily. Today I went from test strips to a Taylor K-2006 with the following results with the water blue but still cloudy and the top three steps visible in the shallow end:
PH 7 (my test trip showed this as high so adjusted it at opening. Pool store had it at 7.4 two days ago)
Obviously some of these numbers are off. What would be the best remedy and order of execution to clear things up?