If I assume your pool is 5 feet deep, then it's around 17,000 gallons. I don't know the size of the bags of TurboShock you used, but if I assume 1 pound and that these are 75% available chlorine, then 3 bags (pounds) would increase the FC level by about 16 ppm.
To shock your pool to kill green algae relatively quickly at a CYA level of 60 ppm requires a constant FC level of 24 ppm. This takes a lot more chlorine than you have been adding since the chlorine will get consumed by algae. You don't just add chlorine once and then stop. You add it several times a day, if necessary, to maintain the high chlorine level.
Now it is possible that the green is copper instead, but it's more likely to be algae. You can take a bucket of pool water that is thickest with the algae and add some chlorine (even bleach) directly to the bucket of pool water. If the green turns gray, then it's algae for sure (copper won't change in color and may even darken at the higher pH from adding bleach). You could add TurboShock to the bucket instead of bleach, but the high calcium and pH may lead to cloudiness which will make it harder to see if the algae changes color.
To test high chlorine levels, you will need a FAS-DPD chlorine test kit such as the one found in the Taylor K-2006. If you already have a test kit that is drop-based (not test strips) for the other parameters, then you can just get the FAS-DPD chorine portion in the Taylor K-1515-A as shown
here. Regular OTO and DPD test kits will not distinguish above 5 ppm FC and the DPD test kit will actually wash out above 10 ppm FC.
Richard
