Thanks foti, popeye can be difficult to treat especially when not sure on the cause but then thats the same with most ailments unless obvious like whitespot and even that can be questionable due to similar parasites.
The salt will do its job at killing the bacteria behind the eye, but until the cause is found the bacteria will continue to re-infect the weakened tissue.
HTH
well when one of my redtail rasboras had popeye i did a 12.5 grams per 10 litre salt bath for 30 minutes with airation. it actually worked!! same with my bn with bloat