what fish have you kept together which normally shouldn't be kept anywhere near one another? mine is my 5" female JD in a 30 gallon tank with .5" synodonis petricolas. i thought the JD would have eaten them for sure but i kept an eye on them and nothing has happened yet. the jd seems to like them because she never picks on the catfish and they even hide under the same rocks. the min reason i think this combo worked was only because my JD will only eat hikari carnivore pellets. she hates any type of NLS and other hikari pellets. she will not eat live fish or ghost shrimp or even bloodworms.