Frequent water changes in aquariums are believed to enhance plant growth, although the exact reasons remain unclear. The discussion highlights that fresh water replenishes nutrients, which may not be adequately replaced in stagnant conditions. Factors such as oxygen and carbon dioxide levels in tap water, as well as the potential presence of competing microorganisms, are considered influential. The role of nanobubbles in promoting growth is also mentioned, with ongoing inquiries into their presence in water sources. Overall, the correlation between water changes and plant health is noted, with implications for both aquatic plants and fish.