Instead of paying hard earned money for an overflow, build one with multi level intakes for less.

If you have a large aquarium and are a diyer this is for you. See how you can make your own aquarium overflow with a multi-level intake. For folks that have an overflow you already know that they along with a sump will keep the water in the tank full. It also helps to remove any film from the water surface and it help to aerate the tank.  They are not inexpensive to buy and I have never seen one with a multi level intake before.

This diy pvc overflow project is from, Dramatic Aquascapes. They came up with a really simple way to show everyone that visits the site how they can build their own water overflow system using several different size PVC pipes and fittings. All of the information is presented in a way that makes it really easy to follow.

Benefits of reading the DIY Aquarium Overflow with Multi Level Intake

Discover a very easy way to build this necessary item for your aquarium.
The project includes a complete listing of all the necessary materials, supplies and tools
It also includes a complete, easy to read and follow step by step instruction guide.
There are numerous full-color pictures that will provide a good visual reference of the project.

http://www.dramaticaquascapes.com/PVC_Overflow_14.html