Dear Andre,Would you like to log in to our online shop and register the product?Once we receive the information, we will reply to you.Here is the link showing how to register the product.https://shop.bitspower.com/index.php?route=account/product_register_processIt is better that you can offer the link to the video which shows the noise.Or please send it by email if you do not have the link, thank you.shopservice@bitspower.com.twIf there are many bubbles inside the loop, there is much noise.In this situation, please exhaust the bubbles as much as you can.And then please fill the water as full as you can.It helps to reduce the noise.Also, the pump has a PWM function,you can adjust the speed to make it slower too.If you have any questions, please don't hesitate to contact us.