Collection Data for the Rio Atabapo: pH 5.0, GH < 1dH, KH < 1dH, Temp 30-34C ...
Like other fish that are strickly blackwater (altum angels, heckel discus), it may just be a matter of matching the wild parameters. Stickly blackwater fish tend to be more HITH susceptible than fish found in both blackwater and white/clear water (S. daemon, A. heckelii).