You are right that you have a problem of no FC and 1.5ppm of CC.

Sorry, but you are WAY too low if that CYA is right:

According to Ben's "Best Guess" table, for a CYA of 100 to 200 PPM, your MAINTENANCE Free Chlorine should be between 8 and 15ppm. Your shock level is 25ppm.
You need 2 1/2 gallons of 10% to get your pool to 25ppm--where it needs to be right now.

1 gallon of 10% will add exactly 10ppm to 10,000 gallons, so calculations in your head are easy.

If your CYA is right, you need to keep 8-15ppm FC everyday, and shock it as necessary at 25ppm.

If your CYA is lower, you can use lower levels. The Best Guess table is stickied in one of the topics here.