I don't keep killis anymore, but my dad still does. The house I live in was built in the 1850's, and the subfloor wouldn't support the weight that would eventually accumulate as I became more and more enthralled in them again.
My favorite killies that I used to raise were Aphyosemion pyrophore RPC 18. I also kept gold australes, Fundulopanchax and Aphyosemions of several species (most notably golden pheasants [Fp. occidentalis] and blue Fp. toddi's, as well as the rather common blue gularis and gardneri's). I really liked one strain of Fp. ameiti that I raised for several generations . . . that strain was striking, and I haven't seen any that nice since then. It's a shame. Anyway, I had about 10 different types of Fundulopanchax and Aphyosemion species that I kept regularly with pretty good success. Not many rare fish (other than the toddi's and occidentalis), but gorgeous fish that I could keep going and trade offspring for others.
I had a phase where I raised Nothobranchius species with varying success--rachovii, melanospilus, and guentherii 'Zanzibar' were probably my favorites and those I had the most success with. I had some rachovii that were egg laying machines, an absolutely gorgeous. I don't even know if the genus is named Nothobranchius anymore.
Ah, well, those days are past. My dad is going up to the killi convention on the last weekend of this month, but I've made my decision to go to the reptile show . . . I think. We'll see how it ends up.
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Homer W. Faucett III, esq.
Purveyor of Trivialities and Fine Nonsense