I have a nice piece of driftwood that I love. However, it constantly grows bba like crazy. I can take it out and bleach it, and within a week, you wouldn't even know I had done anything with it. Any tips on 1. killing bba for good and 2. curing driftwood so it doesn't grow bba? It's not in bright light, in fact I now have it as far from the light as I can get it. Also I don't have bba issues in this tank now, it's only this driftwood that seems to grow it at this point.