In article .com,
says...
before you give your plant an acid bath or spray it with something
nasty, give this a try. Never tried it on scales, but sure works great
on other parasites

http://www.orchidboard.com/eliminate...pests-with-co2

Marty



Sounds interesting. I have a CO2 tank left over from my aquarium days.
Maybe I'll try it and report back.

--
Peter Aitken