Changing the water in your fish tank doesn't require removing the fish. First, turn off the water pump, take out the filter media, siphon out some water for cleaning, and then add aged water.
Here are the 4 steps for the correct way to change your aquarium water: 1. Turn off the water pump and wait for the water level to settle. Then, use an aquarium brush to clean any debris on the inside of the tank. 2. Take out the filter media from the filter compartment and put it in a basin. Use water siphoned from the aquarium to clean it. 3. Determine the amount of water to change. Siphon the water into a drain or toilet. 4. Gently add the aged water along the side of the aquarium. In the summer, ensure the new water temperature matches the aquarium's water temperature. In the winter, the new water should be 1-2℃ warmer than the aquarium water. These are key steps for proper aquarium water change.
When changing the water in the fish tank using tap water, first, fill a container with the tap water and let it sit for two to three days to dechlorinate. Then, carefully add it to the aquarium. If there's a significant temperature difference between the new water and old water, the fish will be very uncomfortable, affecting their mood and appetite. Try to keep the temperature difference within about 3 degrees Celsius. Never pour the new water directly on the fish. Instead, first, remove some of the old water, and then slowly pour in the new water along the side of the tank. Also, do not change all of the water at once. Change only about 1/3 of the water each time. This helps the fish adjust to the new water more quickly. This whole process ensures proper fish tank maintenance. While changing the water, take the opportunity to also clean the aquarium and filter. Dirt can accumulate on the tank walls, the bottom, and in the filter compartment, so disinfection is needed to prevent issues with fish care. Regular partial water changes are crucial for a healthy aquarium environment. Always ensure the new water is properly aged and at the right temperature before adding it to your tank. This prevents shock to your fish and keeps them happy and healthy.