Good "pals" for Yellow Labs?

Sep 11, 2005
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Philadelphia
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#1
If we decided to do our 40g breeder mbuna tank with just two species, and labs are one of them, who would be a good species to use? Who would look nice in contrast to the yelow, and not be a dangerously aggressive fish?

(I am hoping for someone blue, but I'm open to all ideas, as I am a beginner in the world of African Cichlids.)