plumb the H20 flow (by using powerheads to and from?

<Heeee! No... please read... http://www.wetwebmedia.com/plumbingmarart.htm and the linked files above... where you lead yourself> Or, since I am only intending on using this as a fish-only system, is it okay to just use the w/d filtration? I am so torn...I know it may be better to employ all the new school techniques, but I am afraid it will get too complicated and expensive for me. This tank is in my office, and I don't want to be obligated to come in on the weekends to service a very complicated system. Any advice would be appreciated! Thank you for your time in advance. <When, where in doubt with important matters, do nothing... keep reading, chatting... you will know what to do when you are ready, calm.  more