I am running my DOS for auto water changes and I'm changing just over 6,000ml per day. I'm trying to get it done in 2-6 hours but the noise level created by this thing is making it difficult to find the right time. I have an app on my iPhone called decible10th and it's reading 90 on the DOS while running and 70-75 on my couch ~10-12 feet away. This is hard to watch TV or have a conversation while it's going on because of the pitch as well as the volume.
I am wondering if this is a normal noise level people are experiencing with this. I do know that I sent my AFS in for service and it came back virtually silent compared to when I got it. So what's your guys' experience with the noise level of this?
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