I have also seen it from carbon. Many years ago a dusty carbon caused some lateral line in my sailfin. Talked with several experienced aquarists that had seen the same thing.

I stopped using that brand and went back to Black Diamond and never a problem again.

I also like the spirolina advice. IMO, best food there is for tangs in general. Esp. if they wont eat nori at the start. They will eventually figure out how to eat the nori.

And as mentioned soak the spirolina in something like Selcon or Boyds Vita-Chem

thanks for all the help and ideas everyone i just threw in some spriula tablets and she seemed to nibble at them


no3 is under 5 ppm

Try Ocean Nutrition Formula Two Flakes. A very good spirolina flake. I also like HBH Veggie Flake

I read that you should get him out of the tank he devolped HLLE in but tie the only tank I have apart from my display tank ...... Is this disease contagious or just individual fish

IMO HLLE is a water condition/nutrition problem so its specific to certain fish, not to all fish and not contagious.