I have a piece of driftwood in my 50 breeder and it has what looks like fuzz growing over most of it. Does anyone know if it is just the wood from the water, or some kind of algae? Whatever it is, it is not very appealing. The wood has been in the tank over 2 months, and I soaked it for almost a week before i put it in the tank. My water still has a tint from it. Any suggestions?