Something that should definitely be banned.... neon gravel.
Why i have been a memmber on this site sence 2007 and dont have many threads ever cuzz some body is allways a dumn a-s. If you think putting a aluminum can in a fish tank is ok then try it at your house. aluminum rust in water period. and i wouldnt call 50 pounds of black gravel with two and a half pounds of bright gravel neon. I would call it not washing my fish out.