How to treat HLLE?

[Crustman]

I thought I fed my fish a diverse diet but my Coral Beauty and Yellow Tang have this lateral line disease. The Angel has an open crescent above the left eye. The tang is getting better. They get Nori, green agae, New life specturm Ocean Nutrition, Omega One, frozen euphausiids, mysids, herbivore and carnivore cubes. Why is this happening? I use C balance, Magnesisum and Purple up and Sometimes Kalk. Run carbon and GFO and skim heavily. Thanks

[redpheonix]

You might want to check for electric current that's leeching into the tank from pumps or maybe an auto top off that uses a relay. A constant electric current in the tank can stress out the fish, might not be enough for you to notice when your hand is in the tank but the fish (especially hyperactive one) will notice it. Might might be a pump, heater, float valve that controls a relay, might have to change one of them out or add a grounding probe. Hope some of this helps. Zack

[Crustman]

Thanks Zack, I do have one of these grounding probes in the sump. I do not think it is stray voltage. I guess I have to look at water quality issues. Maybe too many toadstools.