Sodium thiosulfate in tank.

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batang_mcdo

Polypterus
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Apr 24, 2006
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how long does Sodium thio sulfate stay in the tank?
If you use sodium thiosulfate in tank, and the dose does not get used up by the chlorine, does it stay in the tank?
will it accumulate over time? or does it evaporate together with water ?
 
is it the purple powder? i would assume as long as you keep up with scheduled water changes it will just go away.
 
But, you have to wonder. Even chemically neutral, it has displaced a few water molecules. If doing large changes and adding large amounts of the chemical, there's a slight paranoia that, over the years, there might be less and less actual water, and more residual non-water chemical slurry. Technically, it's impossible because of water changes always removing any serious accumulation and thus limiting the total amount of non-water fluid present at any given time. But it's a fun thought!
 
knifegill said:
But, you have to wonder. Even chemically neutral, it has displaced a few water molecules. If doing large changes and adding large amounts of the chemical, there's a slight paranoia that, over the years, there might be less and less actual water, and more residual non-water chemical slurry. Technically, it's impossible because of water changes always removing any serious accumulation and thus limiting the total amount of non-water fluid present at any given time. But it's a fun thought!
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yup I'm curious how long it stays, when i do water changes,
for example my tank is 150 gallons, when i do 50% wc, i usually dose with antichlorine good for 100 gallons instead of 75 gallons.
So i'm curious how long unsused sodium thiosulfate stays in the water, also since i usually add stronger doese, it might accumulate.
i dose with more anti chlorine as I'm also worried that there might be times the chlorine in our tap water is stringer sometimes.
 
I agree end products of thiosulfate and chlorine will accumulate in tank, if always adding more thiosulfate and chlorine with each water change! However, what precisely are these end products and should we worry about them?

Na2S2O3 + 5 H20 + 4 Cl2 ---> 2 Na+ + 2 SO4-- + 10 H+ + 4 Cl-

So, we see that all end products are harmless and very commonly occurring.

I think such small quantity of sodium ions and chloride ions take long, long, long, long time, if ever, before tank water become brackish! Also, if fish still growing bigger, they very good st storing sodium (and chloride) ions inside their bodies.

Sulfate ions are also harmless. If anything, they can precipitate heavy metal toxins out of water, so may actually be good thing.

However, note hydrogen ions produced, which make water acidic. Some buffering capacity in tank water, therefore, should be good idea.

Hope I help,
Kuji out.
 
Maybe add a bucket full of distilled water to normal tap water every year, on Songkran (Thai New Year - when everybody throwing water around at each other, so easy to remember), to allow slowly (very slowly) accumulating ions to dilute to normal?
 
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