I put a piece of driftwood with some HUGE BBA (like 1" tall bushes) on it in 100% H2O2 a week ago. The BBA is still there and looks fine, haha.
That has been my experience with wood, power heads, tubing, etc. I still have not seen anything that has made any dent in BBA. Not fish, snails, CO2, nothing. Tried excel, H2O2. I am fooling with photoperiod now.