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Dichlor/bleach Method In A Nutshell


Nitro
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18 hours ago, nmiller0113 said:

Quick question, is this the Clorox that @Nitro was referring to?

Basically yes. It is a 6% sodium hypochlorite with added water clarifiers to prevent dirt from depositing back on clothes in the laundry. However, these very same chemicals are also used as water clarifiers in pools and spas so they will have no negative impact. House brand bleach is normally cheaper then Clorox and just as effective. I buy bleach at Walmart or the grocery store and buy their brand. However, because of Covid-19 the number of bottles of bleach you can buy is often limited so pool chlorine at 10% or 12.5% might be a more viable option, depending on how much you need. For a spa a one gallon jug will last a long time and you can also use it in the laundry or around the house. Just make sure it's a disinfecting bleach with no scents, thickeners, soaps, or other additives (except Poly(Diallyldimethylammonium Chloride) or Polycrylic acid,which are the clarifiers. Besides sodium hypochlorite and water  you will also often find sodium chloride, sodium hydroxide, sodium carbonate, and/or sodium chlorate listed in the ingredients. These are all normal and are either byproducts of manufacture or storage of the product and are nothing to worry about.

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  • 3 months later...
On 4/19/2021 at 5:35 PM, Joewaterco said:

New spa. Sold previous spa. Dichlor just as used before breaking out even after 2 water dumps and shocking   Help 

what kind of help are you asking for? Your post is not clear.

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  • 1 month later...
27 minutes ago, Dancemore said:

Does this method (for hot tubs) also work with Trichlor?  (Trichlor-then-bleach instead of dichlor-then-bleach?)

We have a jug of trichlor tabs left we'd like to use up.  Thank you!

Some more context: Our city water comes in with a pH of 8+.  i’m aware of Chemgeek’s post about Trichlor dissolving fast, lowering pH, and (a plus for us), adding less CYA than dichlor.  The tub is old and not under warranty.  We’ve had pretty low pH after a year though, yet crisp water just using the stabilized trichloro-s-triazinetrione.  So we’ve used Trichlor but never switched over to bleach and I thought of trying that to see if pH will not pull down and wondered if that’s a stupid idea.  Thank you for all the solid advice on this forum!

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11 hours ago, Dancemore said:

Our city water comes in with a pH of 8+

What is the total alkalinity of your fill water? IF you are going to run trichllr then your TA should be in the range of 100 to 120 PPM and, because of the aeration from the jets you will need to monitor both pH and TA closely. Once you switch over to bleach  you will need to lower the TA to around 50 to 70 ppm.

If your initial TA is higher than about 150 ( IMHO is still too high for a spa, IMHO, even when running trichlor) you will need to lower the TA at filling or you will find that your pH will rise too quickly and you will be constantly fighting it.

https://www.poolspaforum.com/forum/index.php?/topic/52522-some-truths-about-ph-and-ta/

 

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On 6/19/2021 at 6:00 AM, waterbear said:

What is the total alkalinity of your fill water? IF you are going to run trichllr then your TA should be in the range of 100 to 120 PPM and, because of the aeration from the jets you will need to monitor both pH and TA closely. Once you switch over to bleach  you will need to lower the TA to around 50 to 70 ppm.

If your initial TA is higher than about 150 ( IMHO is still too high for a spa, IMHO, even when running trichlor) you will need to lower the TA at filling or you will find that your pH will rise too quickly and you will be constantly fighting it.

https://www.poolspaforum.com/forum/index.php?/topic/52522-some-truths-about-ph-and-ta/

 

Our fill water has a TA of 75 with that pH of 8+.  Ok, thank you, I raised it to 100 PPM and will try to keep it there until switching to bleach

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