i recently added 2 large pieces of driftwood to my new 150 gallon aquarium. it has developed a whitish scum all over the pieces which i have washed off and cleared out as much of the stuff from the tank as possible. the pieces are now back in the tank.
what is the scum?
is the scum hazardous to fish or a wet dry?
what is the scum?
is the scum hazardous to fish or a wet dry?