So, if you did the dilution and the test read 80, that means your CYA is 160 since you have to multiply the result by 2.

With a CYA of 160, you need to keep your chlorine levels between 8-15 ALL the time. If you dip lower than 8, you risk an algae bloom. And, when you need to shock the pool, your shock level will be 25ppm.

What is the volume of your pool?