I am going to try and build a 3d background for my aquarium and was going to hide the uplift tubes in the foam and the run the output of the filter to the uplift tubes.
The inlet ports will be cut into the foam and then plastic window screen neeting will go over that so fishes dont get in the back of the background.
Like the one on this web site http://www.csd.net/~cgadd/aqua/46g_construct.htm
If I just left the back open,except with a few braces and then stuck the inlet port in the middle of the 2 inlets I cut in the foam will that pull the dirty water from the tank into the back to do any good.
Let me know if there is any problems with this