http://www.plantedtank.net/forums/showthread.php?t=160940
just one of many, if you google DIY surface skimmer, you will get lots of ideas, and pics, i make mine with upside down aquaclear power heads, with clear under gravel filter tubing going above the surface, with holes drilled all over it. it takes some time to get it just right where water from the surface is flowing down into the filter, but once you get it, you will never want to go with out it. little heads up, make sure you put some type of floss or foam at the base of the pump to catch any debris or it will just make it back to the top
just one of many, if you google DIY surface skimmer, you will get lots of ideas, and pics, i make mine with upside down aquaclear power heads, with clear under gravel filter tubing going above the surface, with holes drilled all over it. it takes some time to get it just right where water from the surface is flowing down into the filter, but once you get it, you will never want to go with out it. little heads up, make sure you put some type of floss or foam at the base of the pump to catch any debris or it will just make it back to the top