Thanks .atmmachine816 said:You would probably want to invest in a canister filter to add onto your bio-wheel. If you are willing to do that then you could get either fish and somebody else will come along and tell you what brand to get. I know eheim are really good though hard to find if your in the US sometimes. I know about the bio-wheels so if you have any questions ask. And if you want to know how to make cheap filters let me know.