question on adding specified amt of 10% chlorine

[dorpo75]

Just tested the water and here are my #'s.
FC 4
CC 0
PH 7.5
Alk 110

I plugged these numbers into the pool calculator (which I love) and it is telling me to add 1 gal + a bit more to get my FC to 5. Does this seem to be an extreme amount of 10% chlorine to you all to move 1 place? :?:

I have not added it yet.

 

[anonapersona]

What is your CYA?

For 13,000 gallons I get 2 cups of 10%

 

[dorpo75]

you know, I haven't checked my CYA in a while b/c my FC has been holding well. I guess I should go and check, eh?

 

[Richard320]

Just tested the water and here are my #'s.
FC 4
CC 0
PH 7.5
Alk 110

I plugged these numbers into the pool calculator (which I love) and it is telling me to add 1 gal + a bit more to get my FC to 5. Does this seem to be an extreme amount of 10% chlorine to you all to move 1 place? :?:

I have not added it yet.

Looks like you entered 1% instead of 10% in the FC line.

You certainly need to know CYA, or you may be underchlorinating.

 

[dorpo75]

I went outside and checked the CYA and the # is 40. I did the test twice (same reagent mixture) and came up with the same reading both times.
Just a recap:
FC 4
CC 0
PH 7.5
Alk 110
CYA 40

Wondering why the pool calc told me to use a gallon of bleach to increase my FC from 4 to 5.
As for the 1% v 10%, I chose the 10% option on the drop down menu. Very strange......

 

[Bama Rambler]

I get 1 gallon and a quart if I enter 130,000 gallons instead of 13,000 gallons for the pool size.

 

[dorpo75]

You hit it on the head, Bama. The total gal. for my pool had an extra zero added, hence the extra chlorine. Not sure how that happened, but no harm done. Thanks to all who were right in there helping me out. Now I will go and add the 2C of chlorine instead of the gallon+.
Cheers. Hope the holiday is panning out well for all folks who are off today.