The suitability of water for aquatic habitats hinges on its chemical composition and purity. Establishing the proper aquatic medium is paramount for the health and longevity of aquatic inhabitants. Several options exist, ranging from tap water, treated to remove harmful substances, to water that has been purified through reverse osmosis or deionization processes.
Maintaining optimal aquatic conditions provides a stable environment, reduces stress on aquatic organisms, and supports healthy growth and reproduction. Historical practices often involved using locally sourced water, but modern aquarists now have access to various treatments and filtration methods that enhance water quality control, allowing for the maintenance of more diverse and sensitive aquatic species.