dotty backs and the six line will most likely fight till death with the dotty back loosing the battle ,they are not a compatible fish , sorry to have to break the news !
always check the compatibility charts when buying fish it will save you this headache in the future ,
and just a fyi they claim six lines will keep Bristol worm populations down don't count on it ,
lighten up on your feeding that will make the difference that will help cut them back
Fish are like lifesavers
They come in different colors