Ok, I wasn't really sure where to put this, so anyone who knows where this thread should go can move it. I keep getting this brown algae stuff in my 29 gal. It grows on the glass, and on my decorations. Currently, I am using a new toothbrush to clean it off, but is there something I can use to stop it from growing? Or something better I can use to get it off? Cuz after a while, my arm starts getting sore from having it in the fish tank scrubbing algae off the sides. Any ideas are welcome. Thanks!