Need Help with Chlorine Levels

[stateroaddog]

I have been to my local pool store (3) times now to get my pool water tested since I did not trust my readings. The pool water has been very clear since the inital opening on May 26. During my first visit many things were off to include CYA: 0, Totl Chlorine: 3.6 and Free Chlorine 0. The company gave me a bunch of chemicals to regulate all sorts of different items in the pool to include 16 lbs of Chlorine.

Second visit to the pool company resulted in CYA: 26, Tot. Chlorine: 1.9 and Free Cholrine 0. At this visit they send me home with 12 more pounds of Chlorine shock to bring the levels up and told me to lower my ph to help the clorine out.

Third visit today resulted in CYA: 0, Total Chlorine: 0.3 and Free Chlorine 0. They told me that they are going to run a different test now to see how much chlorine my pool is using before telling me what to put in next. However they said it would probably take at least another 20 lbs of Chlorine.

This is getting real old and expensive very fast. Does anyone have any advise. Todays readings are:

Temp: 70
CYA: 0
Tot Chlorine: 0.3
Free Chlorine: 0
PH 7.2
Total Alkalinity: 100
Hardness: 300

18 x 37 Grecian Shaped Vinyl pool
21,500 Gallons
The pool water is crystal clear