Hey guys, I want to know what kind of filter that i Should get, I have a 20 gallon, and have a flying fox, , and plan on getting about 4 - 5 angelfish and a Betta. And i was wondering if i'll have any conflicts between the flying fox and the others. and i know the dangers of having a betta with a angelfish but i havent been able to find anything on flying fox'es and compatibility so if you can help me, it'd be nice.