I have never had a need for dither fish with any of my severums. Although one group of growouts did get a little more active when I added some corydora to their tank.
Here is my 180 with a few of my severums and friends. My channel has a few of my other South American fish on it as well.
Here is my 180 with a few of my severums and friends. My channel has a few of my other South American fish on it as well.