Questionable CYA/Slamming/Swimming

rennisdime

Member
Aug 16, 2016
5
johnstown/PA
Hey all I have a "what if" scenario..
If you are not entirely sure what the cya level is..in my example Im pretty sure I can't see dot at 40ppm cya so I rounded up to 50 cya...I am slamming at 20ppm chlorine. Now say it really is 40ppm cya and I'm calling it at 50..is it safe for my family to swim at slam level I listed?
Thanks
 

mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
44,000
Laughlin, NV
Pool Size
6000
Surface
Fiberglass
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
If the FC is a bit high, there may be some eye irritation. Also fading of swimclothes. But their skin will not fall off ----
 
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Donldson

TFP Expert
LifeTime Supporter
Jun 12, 2009
5,132
NW Ohio
When you look at the "active chlorine" levels for SLAM Levels and compare that to what's considered safe in pools without CYA you find that "safe to swim up to SLAM Level" is a very conservative rule. Even accounting for the possibility that the CYA level might be lower than estimated due to the low precision of the test it's unlikely to be noticeable.
 

V___25

Gold Supporter
May 30, 2020
234
Central PA
Pool Size
24000
Surface
Vinyl
Chlorine
Liquid Chlorine
Also, make sure you can see the bottom for swimmer safety.