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"\n\nYes, baking soda can be used to lower the pH in an aquarium. It is a natural buffering agent that helps reduce acidity and raises alkalinity, making it perfect for aquariums with high pH levels. Baking soda should only be used sparingly as too much of it can cause health problems for fish and other aquatic creatures. When adding baking soda to your tank, you should do so slowly over several days, testing the water daily with a reliable test kit to ensure that the correct levels are achieved. Additionally, regular water changes should also be performed when using baking soda to maintain proper pH balance in your aquarium."
<https://aquariumia.com/how-to-lower-ph-in-aquarium/>