The beautiful Sunset Apistogramma, Apistogramma allpahuayo , is a relatively new fish to the Apistogramma hobby, and fairly similar to the wild type of Cacatuoides. These fish tend to be a little more delicate, and less forgiving of water conditions than most bred varieties of Apisto. In their natural habitat, like most Apistogramma , these fish come from soft, relatively acidic water, and these conditions may be required for successful spawning.
We've found Allpahuayo to be a bit more aggressive than other Apistos, with fish often quarelling with one another. They are territorial and will protect their favourite coconut shell, cave, or other structure. The males can be aggressive toward each other, especially during spawning. It is not unusual for a younger, 'subdominant' male to take on the colouration and appearance of a female to avoid aggression from the dominant male -- which can be frustrating for those who think they have a pair!
These fish mix well with other small, peaceful fish, including most tetras, small barbs and other cyprinids, and rainbowfish. Excellent top water additions would include many of the various small killifish, and especially hatchetfishes.