royal knife q's

[fishy_123]

currently growing out a 7" silver aro in a 75 gal, can i mix a 4" royal knifefish in there? or should i get a same sized one? or should i get one at all? can they be kept with aros, are these aggressive? never had 1 before.. how about their growth rate, can they keep up with silver aros?

 

[sbuse]

they are fine...they wont keep up with the aro, but they will be fine...

 

[fishy_123]

gettin 1 then.. thanks! how many inches a month do they put on?

 

[sbuse]

it verys from fish to fish, my ck didn't grow for a few months then put on 4" in one month...

 

[fishy_123]

damn thats some crazy growth, i'll get a decent sized one then...