Apisto's do have a short live span but also breed and grow in a higher rate as most fish. Nowaday's there are a lot of bad qualety apisto's coming from Czech republic and SE Asian. Lots of them become ill a few day's after the move to your tank but I also frequently noticed enormous losses in the lfs a few day's after arival. Most of them lived in poor conditions for (at the breeding farm and during transport) and bloat is very common. Best qualety apisto's come from local breeders or people in the hobby. A cacatuoides (Cac's) and A. borellii are the hardiest along with some domesticated fish like A. hongsloi II. I kept 2 pairs of good qualety Cac's in the past. The females were the first to die. One female was abouth 2 years, the second 3 years, one male 2.5 years and one male 4 years.
A couple of months ago I bought abouth 11 A. hoignei and only 2 males survived after bloat treatment (Czech fish). I also bought 1 male and 2 female a Hongsloy II and one female became ill (bloat) and get cured of it. I expect that female Apisto's are more sensitive and first to die. Number6,.....you have a similar experience with the females?