I'm new to the aquarium hobby. I've started a 20gallon tank with fishless cycling. Then added 1 betta, some tetras, and a plecos. My question is, on the large driftwood in my tank there is several areas of brown fluffy algae. I read it was because when I cycled my tank the lights were off and it grew because of that. I have put the lights back on now but it is not going away. I even took the wood out and scrubbed it off but it's growing back now. Also the plecos doesn't seen to like it. How do I get rid of it? Or do I just toss that one and get a new one?