My filtration seems to be where I want it. Maintenance is pretty simple but I would like to have an easy way to Vac the tank when I need to. I've go Geo's, Rays and Pike that all do a good job churning the sand. I had an Eheim vac that was maybe a 5 on a 1-10 scale - then I learned it wasn't submersible! No real loss. Can come up with something better. I have a few extra pumps, PVC and tubing around. Has anyone come up with a design that they like?