There is a piece of dark bogwood in a community tank, to satisfy the needs of a
bristlenose pleco. I submerged the wood in boiling water for 15 minutes before
putting it in the tank, about a month ago.

This wood appears to have tiny white spots on it. They go away if I rub the wood
with a finger. Nothing else in the aquarium has spots like these. I am wondering
if it is possible that I am looking at Ich ? Then again they could be bubbles.
They are consistent in size, about like small grains of salt.