Thank you for your reply. I need some additional clarifications since I didn't understand all the terminology.

Yesterday, I ran the pool for 24...

Repair it with some strong chemical material which reluctant to leak water from pool.
Water proof cement consider best for this purpose.
I also was...

In my professional experience products that claim to fix leaks with a topical treatment such as a liquid that is flushed through the lines do nothing...

my swimming pool was also old but not old as yours but I am going modify it all but it didn't got leak yet.

Assuming that you can valve off the low wall suction line, I don't see a problem with plugging the wall fitting and valving off the line, as long as...

Thanks Chuck! Yes it is a gunite pool. I am waiting for the water to drop below the light and the returns to see if the leaking stops or at least...

Is the air coming out of the return fitting closest to the filter pad? That would be typical. You are correct in your assumption that the return line...

We initially pressure test to 20 PSI with water, if the line doesn't hold pressure, i.e. pressure drops faster than 1 pound per minute, we then...

Looks like there has been less than a 2PSI drop over 36hours. Sounds like everything is good to go. You can check it out on my blog at...

I don't rinse all the time - if that's it, I'll owe you big time - there is just so much clay though - it seem too much for normal filtration. I'll...

Inground leaks are always tricky. Here's a couple of things you can do for little cost.

If you can pull the light fixture from the wall, you can...

Short term, it probably won't do any damage. Long term it will cause the cement that holds the spillway stone in place to deteriorate, the crack will...

Depending where you live, you can close the pool until the spring. If you can't close the pool like they do up north then run your pool off the main...

Do you have a raised spa? If so there should be at least one check valve to check for failure.