How often should I change my fish tank water to maintain optimal conditions for my aquatic pets? Is there a specific schedule I should follow, or does it depend on various factors such as the size of the tank, the number of fish, and the filtration system in use? With the complexities of aquatic ecosystems, is it not crucial to consider the types of fish I keep and their particular needs? Furthermore, might the water quality degrade more rapidly if I overfeed my fish or if their waste accumulates? Should I also be mindful of the presence of live plants or other ornaments that could influence the tank’s biotic balance? What about the temperature fluctuations and how they might affect my fish? Ultimately, how can I discern when the water has become substandard, prompting a necessary change? Are there specific signs or tests I should regularly conduct to assess the water’s health?