Hole-in-the-head (Head and Lateral Line Erosion)
This infection can also be responsible for head and lateral line erosion (HILLE) disease in fish.
- Pale, eroding holes over the head
- Fish may look as if it is being eaten alive
- Coloration becomes subdued
- Don’t often show until the condition is serious
- Can show general signs of lethargy
- May have trouble swimming due to a loss of balance
Causes of this disease have been long debated, and nobody can say with certainty what the main trigger is.
However, the most accepted cause is the use of activated carbon in closed aquarium ecosystems.
Water quality can also play a role. Aquariums with high nitrate levels can cause fish to develop the illness.
If the infected fish has developed pale, eroding holes over its head, it’s in real trouble.
The open lesions provide an entry point for other pathogens which can cause further illnesses.
However, It’s possible for infected fish to improve when all activated carbon is removed and large percentage water changes are performed.
Improvements in nutrition have also been shown to benefit the fish.
Author – modestfish