In Dichlor-Bleach Hot Tub, are weekly chlorine shocks necessary?

As part of weekly or monthly maintenance in a dichlor-then-bleach hot tub, are chlorine shocks necessary (12-13ppm FC, 30ppm CYA)? Or is it just in response to problems (cloudiness, odor, foaming, etc.)? Just getting over some hot tub rash, so I want to make sure I'm dotting every "i".
 
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Mdragger88

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Jun 1, 2018
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Hernando, Ms
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Vinyl
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Salt Water Generator
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Intex Krystal Clear
If fc goes to zero or close throw in enough bleach to reach shock level for your cya. I do the same after heavy bather loads etc. Doing it on a weekly schedule won’t really be very effective. You need to test then add the bleach it needs whenever that is.
 
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Mdragger88

Bronze Supporter
Jun 1, 2018
1,663
Hernando, Ms
Pool Size
26000
Surface
Vinyl
Chlorine
Salt Water Generator
SWG Type
Intex Krystal Clear
Also i hope you have done a proper ahhsome purge, flush & refill since your rash experience.
The bacteria that causes that takes refuge in accumulated biofilms that are resistant to chlorine/ oxidizers alone.
 
Also i hope you have done a proper ahhsome purge, flush & refill since your rash experience.
The bacteria that causes that takes refuge in accumulated biofilms that are resistant to chlorine/ oxidizers alone.

I did, thanks -- we're refilling today. I just wanted to make sure I wasn't doing something wrong by doing daily FC maintenance only, instead of daily plus periodic shock.
 
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