Herbie now but when I first setup up tank was using dual Dursos with basement sump. Worked perfect for about 5 years before I changed. Would say Herbie is slight more maintenance as every few months I need to open gate valve to clear snails, something never had to do with Dursos.
Only reason I changed was I had a long horizontal run under room used as a office and could hear gurgling in lines when house was quiet (running 1000gph). Herbie did stop the noise heard in the room.
Unless you feel like playing, would say just keep Dursos, as I found really no difference in sound at display or sump (both were/are silent).
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