i use a surface skimmer like this one...
http://marinedepot.com/md_viewItem.a...roduct=HG10240
i have it hooked up to my aqua c pump intake. it took a bit of work to get the two connected, but it works great. i suppose if you have a filter, you should hook it up to that, but since i dont run a filter, i had no other place to go with it.
i ended up fitting a
pvc pipe from the outlet of the surface skimmer to the pump intake. it was 100% custom, but it came out working nicely...
~mike