Hole-in-the-Head (Hexamita)

This guide covers hole in the head fish with practical steps for home aquariums. Pits on the head and lateral line in cichlids signal hexamita and husbandry stress — fix water and diet alongside medication.

For related reading, see ich white spot disease treatment, Dropsy — Causes and Care and Columnaris in Aquarium Fish.

Symptoms

Small pits or eroded holes on head and along lateral line, white stringy feces in discus, lethargy, and weight loss. Advanced cases show open craters.

HLLE in marine fish is a different nutritional/environmental syndrome — do not assume identical treatment.

Contributing Factors

Hexamita flagellates plus chronic stress from poor water, single-species diet, and activated carbon overuse in some discus circles. Debate continues on carbon — focus on water quality first.

Overstocked cichlid tanks with high nitrate run higher risk.

Treatment Approach

Metronidazole-based treatments (where available) in food for eating fish or water column per label. Treat secondary bacterial infection if pits deepen.

Large water changes, improved varied diet with spirulina and whole proteins, and nitrate reduction support recovery.

Diet and Environment

Feed quality cichlid pellets, frozen foods, and vegetables for omnivores. Avoid feeder fish that introduce parasites.

Maintain stable pH appropriate to species — constant tinkering stresses cichlids.

Long-Term Outlook

Early pits often heal leaving scars. Deep lesions may persist cosmetically even after parasites clear.

Prevention beats cure — quarantine, nutrition, and weekly water maintenance on cichlid displays.