"Darkginger" > wrote in message
...
> Also - any ideas where I could get hold of some ammonium
> phosphate, or failing that, what I could use as a substitute? I have a
drum
> of plain 'yeast nutient' but don't know if that would do the job.

Yeast nutrient is generally a mixture of diammonium phosphate (DAP) and
yeast hulls, so what you have should work fine.

Tom S