Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 3 of 3

Thread: safe FC level for swimming?

  1. Back To Top    #1

    Join Date
    Apr 2010
    Location
    Southern California
    Posts
    83

    safe FC level for swimming?

    After shocking and confirming an overnight free chlorine loss test, what is a safe FC level to go ahead and start swimming in the pool again? My CYA is currently at 20, so my shock level is 10, but I don't know how low I need to let the FC get before letting the kids swim.

    Thanks
    12,000 gallon IG (newly re-plastered) pool, Pentair 3/4hp pump, DE filter, TF-100 test kit

  2. Back To Top    #2
    frogabog's Avatar
    Join Date
    Jul 2010
    Location
    Portland, Oregon
    Posts
    1,578

    Re: safe FC level for swimming?

    It is considered safe to swim as long as it's (at?) under shock level.

    So Cal... I might suggest upping the CYA level a tad. I'm thinking 35-40ppm would be a good value to aim for unless you're in a cloudy PNW style So Cal location (nah... San Diego w/the marine mornings is as close as it gets and it still don't qualify, lol). San Francisco I'd believe though :~}
    Where kids swim in 54 degree water, turn blue, and giggle happily cuz they got a POOL!
    Year 3 BBB -15' x 48" Intex Metal Frame - Was using (2) 1000gph Intex cartridge filters (see Full time pumping Intex). 2012, converted to 1600gph and sand filter+SWG = Sand filter love affair!
    Don't waste time and energy looking for a better value on test kits, the TF100 is the best deal around. I did the looking and spent the extra money, but you don't have to make the same mistake. Just go here: TFTestkits. I use Pool Calculator for min/max, and shocking chlorine levels.

  3. Back To Top    #3

    Join Date
    Apr 2010
    Location
    Southern California
    Posts
    83

    Re: safe FC level for swimming?

    Thanks. I was planning on adding more CYA as soon as I fix my slight algae problem. I started at around 50 and went a while without checking it, so I was surprised just the other day when it was down to 20. Guess I've been replacing more water than I realized.
    12,000 gallon IG (newly re-plastered) pool, Pentair 3/4hp pump, DE filter, TF-100 test kit

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •