Water Dechlorination Ratio

Re: Dechlor ratios

Postby jolson » Thu Oct 29, 2009 6:16 pm

ok I might have killed something lucky I asked instead of just trying it I went back and reread the original post and see my mistake, this sight is going to be the best thing I ever came across,
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Re: Dechlor ratios

Postby PaulG » Mon Dec 28, 2009 7:24 pm

Well I got sick of trying to do the calculation of chlor & dechlor ratio's so I knocked together this little table.

Can someone just double check my maths?

Also teh reference to Sodium Thio is the crystals not a pre-made solution.


Code: Select all
Water to treat   Bleach   Sodium Thio
    1000L          2L       120gm
    500L           1L        60gm
    250L          500ml      30gm
    200L          400ml      24gm
    125L          250ml      15gm
    100L          200ml      12gm
     62L          125ml     7.5gm
     31L           63ml       4gm
     25L           50ml       3gm
     20L           40ml     2.5gm
     16L           31ml       2gm
      8L           16ml       1gm
      4L           8ml      0.5gm
      2L           4ml     0.25gm
      1L           2ml    0.125gm
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Re: Dechlor ratios

Postby Scottt » Tue Dec 29, 2009 4:49 am

I checked the 1000, 500, 250, and 8 ratio's, all good. It is a strong chlorine dose, but no real problem there.
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Re: Dechlor ratios

Postby PaulG » Tue Dec 29, 2009 6:27 am

Thanks Scott!
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Re: Dechlor ratios

Postby KathyL » Tue Dec 29, 2009 8:50 am

You are using 8 times as much as you need to.
Liters gallons ml bleach gms thio
1000 264 264 14.52
600 158.4 158.4 8.712
400 105.6 105.6 5.808
300 79.2 79.2 4.356
200 52.8 52.8 2.904
100 26.4 26.4 1.452
50 13.2 13.2 0.726
40 10.56 10.56 0.5808
20 5.28 5.28 0.2904
10 2.64 2.64 0.1452
5 1.32 1.32 0.0726
4 1.056 1.056 0.05808
3 0.792 0.792 0.04356
2 0.528 0.528 0.02904
1 0.264 0.264 0.01452
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Re: Dechlor ratios

Postby KathyL » Tue Dec 29, 2009 8:51 am

sorry, formatting columns doesn't work...
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Re: Dechlor ratios

Postby KathyL » Tue Dec 29, 2009 9:02 am

Dechlor-ratio.jpg





[img ]http://i58.photobucket.com/albums/g254/Kathy55g/0001cC.jpg[/img]
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Re: Dechlor ratios

Postby PaulG » Tue Dec 29, 2009 9:04 am

Kathy,

Thanks I wonder how I managed to get 8 times over hmm....

I think I might stick with it though as I steralised 8 x 2L bottle for algae culture with 4ml of bleach..... 1 of them had an algae bloom :shock:

As far as teh columns go, wrape the text you want in 'code' tags & space it out accordingly.
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Re: Dechlor ratios

Postby torhav » Fri Dec 31, 2010 5:29 am

Before I mix a solution of thio I would just like to know if your calculations are based on anhydrous thio, or the pentahydrate.
Pentahydrate seems to be the most common avialible, but i guess your calculations is based on anhydrous crystals?
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Re: Dechlor ratios

Postby sunny d polyp » Fri Jan 07, 2011 9:19 am

I chlorinate with .4ml of pool chlorine (10%) per gal of culture water and dechlor with .6ml of thio and haven't had a problem. Does this seem to be the proper ratio? I use this ratio for my phyto as well as my rots.
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Re: Dechlor ratios

Postby Scottt » Sun Jan 09, 2011 12:07 am

how does the math work out sunnyD? Is it the same ratio?
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Re: Dechlor ratios

Postby sunny d polyp » Mon Jan 10, 2011 1:41 pm

Hello Scott, well I don't have a way to measure grams, some are using grams and some ml as measurement, I am not a mathematician by any means but from what I can see I'm not using enough sodium Hypo (10%) and too much thio almost twice more than I need and from what I gathered from other posts too much thio will alter water chemistry adversely, I have crashed a couple of cultures in the past and wondered whether or not I'm using the right ratio, I assume I'm not?
Can someone let me know how much hypo for one gal and the amount of thio to neutralize the solution in ml's, I would appreciate it very much.
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Re: Dechlor ratios

Postby sunny d polyp » Fri Jan 14, 2011 3:42 pm

Man, what do i need to do to get my questions answered, I have many. Pay?
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Re: Dechlor ratios

Postby ignatz » Fri Jan 14, 2011 7:16 pm

sunny d polyp wrote:Man, what do i need to do to get my questions answered, I have many. Pay?


I'll try to answer your question.... when you mix thio @ 60g/1L you can neutralize 5.5% bleach at a 1:1 ratio. If you're using 10% bleach, I'd guess you want to mix your thio at 110g/1L to neutralize at a 1:1 ratio. I would verify this with a practical experiment and chlorine test strips before putting it into wide spread use though. Why not just buy a gallon of regular bleach?

Edit - I found this link after posting that describes a practical experiment that answers the question and covers the chemical reactions. HTH. http://usm.maine.edu/chy/manuals/116/text/RdxTi.html
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Re: Dechlor ratios

Postby PaulG » Fri Jan 14, 2011 7:42 pm

sunny d polyp wrote:Man, what do i need to do to get my questions answered, I have many. Pay?



Sunny,

I think you will find the reason you have had no answers to your question is becasue none of us use 'pool chlorine' but rather common household bleach or Sodium Hypochlorite
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Re: Dechlor ratios

Postby sunny d polyp » Sat Jan 15, 2011 11:49 am

Thanks PaulG and ignatz, I use the hypo because I read on here somewhere I cant find the thread that house hold clhorine has stabilizers in it that stiffle the declhor process, I guess since the hypo is pretty cheap I'll keep using it, again Thank you for the reply and thanks to those members/moderators that keep this forum going, I will also do my part to help the best way I can.
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Re: Dechlor ratios

Postby torhav » Sat Jan 15, 2011 4:23 pm

I'm not sure if household bleach has more stabilizers than pool chlorine. It probabliy lacks the ingredient that makes it active.
My supplyer of pool chemicals told me that chlorine for pools is active and can't be stored on airtight containers, as it is releasing gas.
Household bleach is not active and is not releasing gas in the same way. It can be stored in airtight containers which is more safe as we keep it inside our house.
The difference according to datasheets is that sodiumchloride is added to the pool chlorine.
If NaCl is what makes it active, well then we shouldn't be afraid of using household bleach in saltwater cultures?
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Re: Dechlor ratios

Postby KathyL » Mon Jan 17, 2011 11:41 am

It is not clear to me what is meant by "active" or "stiffle the dechlor" process. I do know that using plain household bleach with no perfumes added in, works. Using Sodium thiosulfate in the way that I and others have described above also works well to dechlorinate and make the water safe. There may be other ways to do this, but I find my way simple and effective. For what it's worth.
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Re: Dechlor ratios

Postby jolson » Wed Jan 19, 2011 1:06 pm

not sure what you mean by cheap, if I got the math correct you should be able to do ( 1 US gallon = 3 785.41178 ml ) 3785 gal of water with one gal of bleach thats pretty cheap and seem much easier
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