i need to know what to do here..petsmart has a 55 setup for $150 i have about $180. should i get this or get a used big tank, im planning on having 2 sengal bichirs and some other carnovarus (wrong spelling) fish in the tank. what size should i get? oh and one more question: will my brown african knife and peacock eel ever eat live? ive given them feeders but they ignore them