I'm running this skimmer and the noise is good for me, but I'm only running it on 6.
Pulls good skimmate. My only complaint is that it's difficult to clean compared to other skimmers I've had. The clear open volute doesn't come apart, so it's impossible to clean, and the plastic screws holding the motor on really suck, and a screwdriver barely fits. I ended up replacing them with titanium socket head cap screws.
Also the airline gets a small kink in it where it comes out of the skimmer body. Really poor design. I contacted Coralvue and all of them they had on the shelf were the same, so obviously a manufacturing issue. It doesn't seem to affect operation, but it's not right.
The needle wheel is very fragile, so be careful not to break the pins off
I also don't like that you can't take the skimmer body off without disconnecting the airline. Just poor design.
It does skim good though.