Sodium Thiosulfate .. and ?

Where can I obtain Sodium Thiosulphate? I would also like to here about
ammonia removal.


"Bob K." wrote in message
...
Sodium Thiosulfate can be used to remove chlorine.
But it will also break the chlorine+ammonia bond of
chloramine and remove the chlorine.

What can be used to remove the ammonia?

(I know about all the brands like Amquel, etc,
but that's not the question)

Thanks,
Bob (slept though Chem 101)