Grooming & Hygiene Guide

Hygiene means aquarium maintenance^★

For tropical fish, hygiene is primarily about maintaining a healthy aquatic environment rather than washing or grooming the animal. A clean-looking aquarium is not necessarily a healthy one. RSPCA guidance recommends water testing because ammonia and nitrite cannot be assessed reliably by appearance alone. Filtration, appropriate stocking, water changes and removal of waste all contribute to a suitable environment.

Clean without damaging biological filtration

Aquarium cleaning should remove waste while preserving the beneficial bacteria that process fish waste. RSPCA advises swishing filter sponge or media in aquarium water removed during a water change rather than washing it under the tap, because chlorine can damage beneficial bacteria. Replacement water should also be treated appropriately and brought to a suitable temperature before being added.

Health observation and safe routines

Routine maintenance should include checking fish behaviour, appetite, breathing and appearance as well as equipment. White spots, damaged fins, unusual buoyancy or gasping can indicate health or water-quality problems. If a fish becomes unwell, test the water first and seek specialist veterinary or aquatic advice where appropriate. Cleaning products must never introduce household chemicals into the aquarium, and maintenance should minimise unnecessary stress to the fish.