Sorry, I can't answer in Decimals, but just setup mine last week, and it runs very silent for the most part. Adding a second filter and air pump this week, so it might get a little louder, but I don't think noise is going to be an issue with this tank as the filter is inside the tank and it's covered with a glass top. (In fact you can think of it as a gentle pond - water moving sound)
answered 8 months ago
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