I came up with 15K, but you may be compensating for actual pool layout better than I am.

Anyhow, do this:

1. Turn your pump & filter on ASAP.
2. Add 1/2 gallon of 6% plain bleach each evening, till you get on a program.
3. Do NOT try to adjust anything else, EXCEPT pH, but even then only if the pH is >8.0 or <7.0.
4. Do a complete set of tests on your pool water, once the pool is full.
5. Do NOT turn on the SWCG, yet.
6. List what chemicals you still have, on hand.