I am using an Abyzz 100 as a return from my basement on my 300G display tank, and another Abyzz400 in the cabinet under the tank as a closed loop pump. the tank is in my living room right next to my couch, and the pump is absolutely dead silent!I am really impressed with the Abyzz pumps. My only negative thing, is at the price they cost, and the fancy controller and settings
, they should have implemented a feed mode. My return pump is in the basement, along with the controller. I don't like food going over the filter overflow, so I turn off the return pump at each feeding. Yes, I could place the controller upstairs in the cabinet, but in my mind regardless of where the controller is, I shouldn't ave to push the button to restart. it should use a feed mode to restart automatically!