K, I'm working on purchasing a 5-7" black devil cat. The thing I know is they are dangerous to other fish. I have a vittatus tigerfish and want to know if they can be put together. Regardless ill be getting one and I have the space but would be nice to put in my monsters tank. My vittatus is 6" and I also have a bichir, payara, and silver arowana all about the same size! What do you all think?