So I’m very disappointed in these Aquaclear filters. I’ve had numerous noise issues with them. The most recent being that when the flow control is on the lowest setting the filter makes a grinding type sound. When the flow rate is set to the highest setting it’s dead quiet. I have a Betta in this tank so I need the flow rate to be as little as possible or else I would just have it on high. I’ll take any help I can get, it’s very frustrating.