How much Potassium Metabisulphate should one add to water to make a
sanitizing solution?
Does anyone have an opinion and if so thank you in advance.

In a recent post, there were some varied opinions on this topic. I use a 10%
solution, made with distilled water. I make about 500 ml at a time, keeping
it in differing sized broan glass chem bottles with secure lids. Keep potent
for a long time. I am able to use the smae 10% solution for sanitizing,
airlock fluid, and adding sulfite - so as not to mess with varying strength
solutions (increses the risk of screwing something up!).

To make a 10% solution, put 50 grams of K2S2O5 crystalline powder into a 500
ml beaker, then fill the beaker with distilled water to the 500 ml level.
Agitate with a magentic stirrer until absolutely dissolved.



> How much Potassium Metabisulphate should one add to water to make a
> sanitizing solution?
> Does anyone have an opinion and if so thank you in advance.

I use a weaker solution than Ric, I add 1/4 teaspoon pot meta to 1
quart of water in a spray bottle. I add 1/2 teaspoon of citric acid to
lower the pH too. That works out to about a 1% solution.

Joe


Ric wrote:
> In a recent post, there were some varied opinions on this topic. I use a 10%
> solution, made with distilled water. I make about 500 ml at a time, keeping
> it in differing sized broan glass chem bottles with secure lids. Keep potent
> for a long time. I am able to use the smae 10% solution for sanitizing,
> airlock fluid, and adding sulfite - so as not to mess with varying strength
> solutions (increses the risk of screwing something up!).
>
> To make a 10% solution, put 50 grams of K2S2O5 crystalline powder into a 500
> ml beaker, then fill the beaker with distilled water to the 500 ml level.
> Agitate with a magentic stirrer until absolutely dissolved.
>
>
>
> > How much Potassium Metabisulphate should one add to water to make a
> > sanitizing solution?
> > Does anyone have an opinion and if so thank you in advance.

Jim wrote:
> How much Potassium Metabisulphate should one add to water to make a
> sanitizing solution?
> Does anyone have an opinion and if so thank you in advance.

Most manufacturers/retailers recommend 2 oz/gal water

I think there are a lot better sanitizers out there. I prefer Starsan,
myself.