Goose has a gunite pool. You can take a gunite pool up to high chlorine levels without much problem but it is not the same for a vinyl pool. I would not add 15 gallons of bleach to your pool. That would add about 36ppm of chlorine. Too high for a liner pool with a CYA of 50. Every gallon you add is going to add about 2.4ppm of chlorine. Use that as a reference. Also, read the Best Guess Chlorine Chart in my signature below.