Not much info on them out there. Most you'll find is likely right here on this forum from other member experiences.
They definitely need lower pH, soft water, otherwise they have a strong chance of getting HITH. They are somewhat prone to bloat as well, so be sure to avoid blackworms at least. Treating with PraziPro would be a good idea, regardless of where you got them from.
They are SUPER rare pike, so I wouldn't really want to risk them. In a community tank they would make very attractive fish, especially with other SA cichlids. I wouldn't put them with lenticulata though, as lents are more robust and generally more aggressive. Be an expensive 'mistake'. The kelberi might work, but might out grow the pike and eat it is the only prob.