HLLE (hole & lateral line errosion) is generally brought about by poor diet, poor water quality, or agressive behavours leading to stress, conductivity issues, parasitic invasions, or all of the above! now its up to you to fill in the blanks so the process of elimination to begin!
what setting do you have? reef, fish only, mixed?
second question, do u have a
QT set-up?
third thing is any of the above have to be identified & corrected asap.
forth is treatment, simple treatments are the likes of melafix, where its gets tricky is with the
copper based medication, cause if you have corals they will be destroyed>hense the
QT question.
see how u go with that, & post up a few responses, others will chime in soon
