95 gallon
hes in with a pleco
2 convicts
2 yellow labs theyve been together forever and he hasent botherd them ive tryed to add a few new fish lately but he eats them, its almost like he doesent like certain colors
It's not only colors, but the quantity of fish you're adding. You'd have much more success adding new mbuna's in groups. Single additions are seriously disadvantaged. Adding 1 or 2 greatly enables the demasoni to focus on them and eliminate them, regardless of tank size.
Adding 6-8 at a time (your tank volume would allow for this), would be much better. It may still chase the new fish, at least initially, but wouldn't be able to focus on any particular fish for very long. Each fish would receive only one-sixth to one-eighth the aggression one fish would receive, and that wouldn be the difference between life and death.
Were the convicts removed , you could add lots more mbuna's (15-20 more which would be a more appropriate quantity).
With this said, adding another demasoni will be challenging, because they're extremely conspecific aggressive. You'd still experience losses among them if kept in small number (less than 12). Unless you want a bunch of these guys, don't add any more demasoni's.
So, you can
either relocate the convicts and add a
lot more mbuna's,
or keep the convicts and the current list of fish you have (being an african cichlid enthusiast, I recommend the former :headbang2: )