gymnothorax polyurandon in blackwater aquarium

[tongolino10]

my understanding is that this is a primarily freshwater species.

do they adapt well to the lower pH of a blackwater aquarium? or is it necessary to maintain a high pH and hard water for their health?

 

[Simonas]

Had mine 18 months he lives in the alfagrog section of my sump but my water is soft and low in ph