<human>:  What is the best way to clean up a fish tank?
<bot>: The best way to clean up a fish tank is to first remove any visible debris, uneaten food, and dead fish. Then, do a partial water change of about 10-20%, siphoning out any dirt and detritus from the bottom of the tank. After, use a good aquarium chemical filter media to remove impurities from the water. Be sure to also clean the filter media and rinse any gravel, rocks, and decorations. Lastly, make sure to use a thermometer to monitor the water temperature and check the water levels to ensure the tank has the correct levels of dissolved oxygen and pH.