I merged all your threads to keep the story together.
First, you need to realize that pool store testing is notoriously inaccurate and inconsistent. If you want to take control, invest in one of the
Recommended Test Kits.
Second, those results do not make any sense. It is impossible for the TA to be zero with a pH of 6.3.
Also, you have a vinyl pool, so the hardness level does not matter, so there was no reason to spend money on calcium flakes.
What kind of "shock" did you use? That is either adding a LOT of stabilizer (CYA) or a calcium (CH).
You might get lucky and not have damaged anything and your pool may clear, but if you want to be 100% sure the pool is safe and the algae is gone, then you need to follow the
SLAM Process exactly, and that requires a good test kit.
How much
Pool School have you read? Start with these:
ABCs of Water Chemistry
Recommended Pool Chemicals
How to Chlorinate Your Pool