What's the Best Hot Tub

Author Topic: Bleach  (Read 1648 times)

Bigralphy

  • Junior Member
  • *
  • Posts: 38
Bleach
« on: May 23, 2015, 10:28:40 pm »
Is it possible to use bleach, either 6%colorox or 10 pool chlorine as a supplement with dichlor? 

Hot Tub Forum

Bleach
« on: May 23, 2015, 10:28:40 pm »

Hottubguy

  • Ultimate Member
  • *****
  • Posts: 2150
Re: Bleach
« Reply #1 on: May 23, 2015, 10:31:14 pm »
Yes

Bigralphy

  • Junior Member
  • *
  • Posts: 38
Re: Bleach
« Reply #2 on: May 23, 2015, 11:09:06 pm »
Thanks

chem geek

  • Full Member
  • ***
  • Posts: 569
Re: Bleach
« Reply #3 on: May 24, 2015, 08:43:13 pm »
Just keep in mind that after a fresh refill you should NOT start out using bleach alone without either first adding pure CYA (which is slow to dissolve) or using Dichlor first (which for every 10 ppm Free Chlorine, it adds 9 ppm Cyanuric Acid).  The reason is that the chlorine will be too strong if there is no CYA in the water.  CYA moderates chlorine's strength.

Also, keep in mind that you will experience a rise in pH when you are using bleach due to carbon dioxide outgassing that always occurs.  Dichlor is not actually pH neutral as claimed.  It may be close to neutral (slightly acidic) upon addition, but chlorine usage/consumption is acidic so when you are using only Dichlor you are in effect adding an acid over time and that keeps the pH in check but also slowly lowers the TA level (for every 10 ppm FC, it lowers the TA by 3.5 ppm).  So once you switch over to using bleach you should lower your TA level to around 50 ppm and to supplement pH buffering you should use 50 ppm borates from boric acid.

If you are just going to use some bleach but continue to use Dichlor, then you can probably just manage by adding some acid now and then to keep the pH in check, just realizing that the TA will continue to drop over time so at some point you'll need to add baking soda to raise it some.

Hot Tub Forum

Re: Bleach
« Reply #3 on: May 24, 2015, 08:43:13 pm »

 

Home    Buying Guide    Featured Products    Forums    Reviews    About    Contact   
Copyright ©1998-2024, Whats The Best, Inc. All rights reserved. Site by Take 42