Not sure to be honest, I would assume so. Anything abnormal has a scientific label.
From what I'm told, carbon gives Cichla HITH.
Hmmm my cichla or discus have not gotten HITH from carbon...? I use a carbon block filter in my RO unit and tap water..had them for years no HITH. I believe that is one of those aquarium myths that keep circulating...like salt