Simple answer! Because they look a lot better than plastic one's and ultimately when you are aquascaping you need to ensure the focus remains on your plants, and not on equipment. I mean, who wants to look at ugly green pipes anyway? I sure as hell don't.
For those of you who don't know, Lily pipes are glass designed to replace the plastic pipes that are fitted onto the end of your filter tubing. They're much more stylish and easy on the eye and work great too.
But Lily Pipes also have another function that quite a lot of you may not even realise. Do you ever get scum build up on your aquarium surface? A lot of people do and go to extreme lengths to get rid of it. It's actually caused by a lack of plant nutrients (I'm sure I've done a blog post on that...) but if you place your lily pipe outflow fractionally below the surface, a vortex will be created and it will suck in and spit out your surface scum! It's great and so satisfying to watch.
So treat yourself today and try out a glass Lily Pipe - you won't regret it :)
