Think it depends on the type...didn't have any issues in my 90 but the wood was/had been wet for 4 straight years...then added some clump stuff that I got free and when I broke the tank down 2 yrs later you almost had to use sandpaper to get it off....
Think it depends on the type...didn't have any issues in my 90 but the wood was/had been wet for 4 straight years...then added some clump stuff that I got free and when I broke the tank down 2 yrs later you almost had to use sandpaper to get it off....