Pseudotropheus crabro (bumblebee) is a large aggressive fish, so 1m:7f is a good idea and that takes up 2 species slots.
If you want to keep two males of Metriaclima estherae then double the females so 2m:8f and that takes up two species slots.
I'd do 20 demasoni and call it stocked if they are your next most favorite fish.
If you want to keep two males of Metriaclima estherae then double the females so 2m:8f and that takes up two species slots.
I'd do 20 demasoni and call it stocked if they are your next most favorite fish.