new home, old water?


New member
Jun 28, 2019
Phx AZ

Only been in home for about 6 months, summer's here and cant get water to stay clear. Pool store says its nitrates. I shock, pool turns cloudy, add floc and clarifier which didnt really help, backwash a lot of white water, pool gets a bit better, then after a couple days no chlorine and once I add shock, cloudy again and process repeats.
Thoughts are old sand, old water, nitrates? I have a test kit on order, otherwise clueless with an unusable pool.
Any advice is appreciated!