I've not connected it yet, just testing out the 'fit'. But I'm excited if this can really replace my standalone surface skimmer, thats one less piece of bulky equipment in my tank! The only downside is that it doesn't come with a Lily Pipe extension but fortunately I have a plastic Lily Pipe extender for my green Eheim outlet which I could just plug in. It will be connected to my Fluval 307 so hopefully there is enough flowrate to make the skimmer work.