L-134's would definitely eat Apisto eggs, no way the parents could fight them off at night. Same deal with the oddball catfish, not good for a breeding tank. It's not surprising that the catfish is invisible, doesn't look predatory so it probably burrows in leaf litter or similar muck and snatches whatever it can. From the relative size of the eyes it likely can't see very much clearly.
The big whiptail looks nice, but even if you'd brought it back it would have needed a bigger tank. Cool fish, good luck with spawning the Apisto's.