I have my tank in my bedroom, and I have had it in there for about 2 months now. It is starting to smell a little. It isn't something that I really notice I guess that I am getting use to it, but my friends notice it. I was wondering if there is anything that can get rid of the smell? I clean the tank once a week, with atleast 50% water changes. Is it normal to have a little smell with a tank? Thanks