No idea
They all live in 10s with sponge filters and lots of moss, small annubias/driftwood shards, oak leaves and floating water sprite, get RO/DI water changes of about 50% every 2-4 weeks, mostly flake food but occasional frozen bloodworms/minced blackworms, and a pot and/or a coconut shell for spawning. I have no idea what the pH is but if I'd had a better way to isolate the males after spawning I'd truly have a lot of Apistos. Think a communal paternal/bachelor tank to give all the fathers time-outs while mothers raise the broods is needed but that may be because 10s just aren't spacious enough to be conducive to co-parenting.
If I'm going to bother to raise a bunch of fry I want there to be 15-20 at minimum and preferably twice that so if the males don't get isolated more or less immediately my interest in fussing with the fry sort of vanishes. So I started my bachelor tank. My A. baenschi/Inka came through again last week and I pulled the male right away - as a result I have about 40-50 fry instead of what would likely be a dozen by now. But again, with a bigger tank it might not be an issue.
Anyway, they're not so hard to please it seems, these Apistos. Am sure live food helps, water changes maybe not so much, lower pH than tap almost to be sure.