I've noticed over the last couple of days some of my fish havn't been right and today when i got home from work several of them have a light dusting of gold spots,i've started a course of protozin to treat it but was wondering if there was anything else i could do as in turning the heat up like you do with white spot,also how likely is it to kill my fish,my ornate pim is the worst affected and since they are like rocking horse dung over here i would be gutted to lose him