Six year old posts, Andrew, and still being read. Wow. It is now practically impossible to find milled sphagnum moss. It used to be a major component in my custom-made potting media, but hasn't been in probably 3 yr. Regular (long fibered) sphagnum is easily found and of course peat is available everywhere. You don't need an acid testing kit to tell the difference. Now that milled sphagnum is no longer available, this wouldn't be an issue. They look and feel of sphaghum moss and peat moss are completely different and are of course labeled completely differently.
It is interesting that these old posts are resurrected occasionally if for no other reason, to point out how things have changed.
