I do not, mixed with a few Peacocks and very mild mbuna(the greshaki and a few acei). I was scorned so strongly about mixing African lake species I've never attempted it, though knowing you I 100% understand any attempt at it knowing you will do your due diligence. I would say they will work out, just realise though they carry the mbuna namesake they do not carry the aggressive characteristics. I'm sure you're well aware.
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Thanks TMRC. I do know the labs are mild compared to most. What I'm reading about the calvus and the cyanostictus is that they are only aggressive towards their own kind and ignore others for the most part. I have no problem separating if need be. I may just go with some Neolamprologus Leleupi for a splash of yellow but need to do some more research.