Is this right?

[Philo]

I'm leaving for a week soon.
My CYA is 60.
My FC is 7
My CC is 0
I use about 2 FC per day.
Can I add 3.5 gallons of Chlorine just before I leave and expect good a FC level a week later?

 

[JamesW]

The loss rate is proportional to the fc/cya ratio. With a higher ratio, your loss rate will be higher. So, it's not as easy as just adding enough for a two ppm loss per day. That said, at this time of year, you'll probably be fine with your plan.