The frequency of aquarium water replacement for Betta splendens is a crucial aspect of their care, impacting their health and longevity. The term refers to the regular partial or complete removal and replacement of water in a betta’s tank. An example is performing a 25% water change every week in a five-gallon tank.
Maintaining optimal water quality is paramount. Regular water changes remove accumulated toxins like ammonia, nitrites, and nitrates, byproducts of fish waste and uneaten food. Diluting these substances prevents them from reaching harmful levels. Doing so mitigates stress, which can suppress the immune system and increase susceptibility to disease. Historically, betta keepers relied on observation and experience to determine suitable water change schedules; modern aquarium keeping emphasizes routine testing and proactive management.