how much FC should I lose in 24 hours

[benny27]

Short question, About how much FC should I lose in 24 hours cover on and no one uses it? And at what point would be to much drop?

Long way to the same question...
I have had a pool and have been able to keep it looking good and feel I know what to do with it.
Now I just got a 270 gallon hot tub and so far so good. we have been in it most days and I have been testing after we get out and 1 time was down to FC .5 so I added enough to bring it up to FC 12 just in case. most the times have been around FC 2 or more.
Water is looking just as good as day 1
Ph is staying at 7.6
TA 50
CYA 30
CH 125 (should I add a bit more?)
Being a new hot tub I am seeing some recommendations to use Ahh-Some cleaner.

side note I am thinking I will go to a SWG befor the winter. would Borate be good to add then or not? I am debating if I should try Borates now or not.

 

[RDspaguy]

Definitely purge with Ahh-Some on any new to you spa.
Ozone will deplete CC and FC given time, which lets you shock to high levels after use and not have high FC the next day.

 

[benny27]

looks like I am losing 2 FC in about 12 hours. I just get my Ahh-some in the mail today. The plan is to purge tomorrow.
I sill have not been able to find a number on how much FC lose is normal.

 

[RDspaguy]

Alot of factors play into that. I think there is something on it regarding pools here, but I am not sure where.
Perhaps @mknauss or @Jimrahbe knows.

 

[benny27]

Alot of factors play into that. I think there is something on it regarding pools here, but I am not sure where.
Perhaps @mknauss or @Jimrahbe knows.

from the pool school overnight FC loss test shows a loss of 1.0 ppm or less. Perform the Overnight FC Loss Test (OCLT) - Trouble Free Pool
Coming from a pool I just have that mindset but with the smaller size and hot water I did not know if the same idea works with a spa.