After shock process, is this much FC loss normal in 2 days??

ED-209

Well-known member
Apr 2, 2012
58
Florida Panhandle
#1
Greetings fellow TFP'ers...

I just recently, Thursday morning, completed my 1st shock process and ended with a FC of 32.5 early that morning and figured I would be good for a while so out of curiosity I just did a test about an hour ago and my FC was at 12.5, so I lost 20 PPM of FC in 2 days, is this normal?

I think I've read some posts where higher FC levels do go down quicker but just wanted a sanity check if possible...

It's been around the upper 80's, low 90's these past 2 days, my pool is 15,500 gallons, my CYA is 60 and water temp is 86 degrees.

Thanks so much for the help and info.

Wishing clear pools to everyone :) (my attempt at a catchy line for this forum) :)
 

JasonLion

TFP Expert
Platinum Supporter
LifeTime Supporter
May 7, 2007
37,879
Silver Spring, MD
#2
Re: After shock process, is this much FC loss normal in 2 da

Yep, that is normal. Assuming all else remains the same, you lose a fixed percentage of your starting FC level. Double the FC level and you lose twice as much each day.
 

ED-209

Well-known member
Apr 2, 2012
58
Florida Panhandle
#3
Re: After shock process, is this much FC loss normal in 2 da

Whew, thanks Jason, puts my OCD mind to rest and makes me happy too as I thought I wouldn't be able to get the FC down below shock level by this weekend. Now I get to test out the pool with the new salt level of 1870, originally 370, to see how it is and if it feels better.

Thanks again for the help...
 

woodyp

Mod Squad
TFP Expert
LifeTime Supporter
Apr 17, 2010
10,206
East Texas
#4
Re: After shock process, is this much FC loss normal in 2 da

It is fine to swim with FC up to your shock level. You're golden.