I boil the driftwood and if you use a buffer I don't see any issues DW.
BUT... He does make valid points and it's really a mute issue as I believe driftwood will interfere with your theme.
Go with natural grey rock.
"When creating an aqua scape, strive for the beauty of imperfection, as its art and there is no wrong or right, it's left open for interpretation" James Findley