Aquarium fish gill disease — parasites, bacteria, and environmental causes
Verbatim first-hand facts from Merck Veterinary Manual (professional veterinary reference). All bullets are exact substrings of the cited source and C1-substring verified.
Gill disease
- Divalent ions are excreted principally via the kidney, and monovalent ions and nitrogenous excretions via the gills.
- Accordingly, lesions of the kidney and gills may seriously interfere with respiration, excretion, and fluid balance.
- A gill biopsy can also be performed, but the fish should be returned to water for a brief period (30 seconds to one minute) before performing another procedure.