It's important to keep your tank clean and healthy for the fish, plants, and other aquatic life that live inside of it. One way to do this is by regularly removing debris from the gravel or substrate material at least once a month. This will help prevent buildup of dirt, waste, leftovers from uneaten food, or any other detritus that can cause harm to your tank inhabitants. It’s also important for promoting good water quality since these substances can alter the chemical composition in an unhealthy way if not removed promptly. To do this safely you should first siphon out as much of the debris as possible with a gravel vacuum cleaner before using your hands to remove any remaining bits caught between rocks or corals. Doing this routine maintenance on a regular basis will ensure that your aquarium remains healthy and balanced while providing an inviting environment for all its inhabitants!