Beautiful fish! Do you have pictures of the female? The reason I ask is because I think your 'daddy' is really the mommy. The females show more of a lemon-yellow body coloration with bright red bellies and have a distinctive dark spot/mark in the dorsals.
Here's my old pair. The male is in profile with the female behind. You can see the color difference and dorsal marking.

Male only

I found them to be shy yet absolutely brutal on tankmates. They were never responsive to me like their larger cousins were. But the colors...oh my the colors.
Matt, FWIW I kept mine in moderately hard, alakaline water (8.0pH, 10dGH). They did just fine. I keep almost all of my CAs in the same water conditions as my Malawis. In fact, in nature a lot of these fish come from water that is just as high in pH and much harder than water from Lake Malawi!
Again Debbie, beautiful fish!