Chemsan/Starsan - how long is it good for?

[blockley]

Newbie, so apologies in advance!

I’m sure I read somewhere that when you make up starsan you can keep it and re-use it.
Is this correct and, if so, how long can it be kept for/how many times can it be re-used?

thanks

 

[Clint]

I think as long as the pH stays around 3.5 it can be used over and over...

 

[Dads_Ale]

You need to keep it sealed because if not will draw moisture out of the air and so reduce the acidity.
Recommend getting some ph strips so you can check now and then . I make up a 2 litre batch and that holds its ph for months, I also have a small spray bottle that I top up from the 2l bottle and check ph before decanting.

 

[blockley]

I think as long as the pH stays around 3.5 it can be used over and over...

Thanks, that's one less thig to worry about then!

 

[blockley]

You need to keep it sealed because if not will draw moisture out of the air and so reduce the acidity.
Recommend getting some ph strips so you can check now and then . I make up a 2 litre batch and that holds its ph for months, I also have a small spray bottle that I top up from the 2l bottle and check ph before decanting.

Thanks, I've got a spray bottle but wouldn't have thought to check that too, good tip thanks

 

[MyQul]

Wot clint and DA says. I have some of those £1 for a million ph strips from ebay. I just constantly reuse my star san. Every so often I'll test it's ph. If it's above 3.5 I'll add maybe 1/4 of a teaspoon to the jerrycan full. This usually get's it back below 3.5. I've had my bottle of starsan for 5 years and there's still about 1/5th left

 

[Clint]

...not bad for a 100ml bottle.

 

[MyQul]

...not bad for a 100ml bottle.

Mine was the 8oz/236ml bottle but still good going i think

 

[blockley]

Wot clint and DA says. I have some of those £1 for a million ph strips from ebay. I just constantly reuse my star san. Every so often I'll test it's ph. If it's above 3.5 I'll add maybe 1/4 of a teaspoon to the jerrycan full. This usually get's it back below 3.5. I've had my bottle of starsan for 5 years and there's still about 1/5th left

Thanks, that's a Top Tip!