My guess is that this might be an Intex pool? If I'm wrong, please correct me. Please fill in your pool's information in the pool chart:
Pool Chart Entry Form
Pool Chart Results
The reason you can't access the links is that your registration is not yet completed and until that time, you can't see the rest of the forum while you are logged in. (That inconvenience goes away once it is completed, however.) In the meantime, to be able to see the links Janet was referring you to, you'll need to log out. then, go to the "minerals" section of the forum and read the thread called "Bucket Test for Metals." The other link she wanted you to read is in the "Pool Chemistry for Intex-Type Pools" and the thread is at the top of that section and is called "Before you fill your intex-type pool with well water."