Hi all, still in the building/decorating process and I went on craigslist the other day and found this sweet piece of driftwood. I was planning on going with fake plants to make things a little bit cleaner, so with a piece of driftwood I bet I can expect some algae growth. I dont want that haha. So my question is, can I seal my piece of driftwood? I guess I mean is there a clear coating that is safe for aquariums?