I have had a 50 gallon tank for about a month now with two small severums, a small tinfoil barb, a small bala shark, a 4 inch silver dollar, and two small angels (small in comparison to their max size). I was wondering if someone can give me some recommendations on the following things: I was thinking about getting a bottom feeder. What would someone recommend for my tank? Are there any other fish that would be a good addition to my tank? Also would it be ok to move my betta to the 50 gallon or would the betta create problems?