I still have the thought in my head of one day building a W/D for my 120 and ive been reading up on what everything is and how everything works, and my friend recently got his own W/D and ive been able to see the parts working in action. But some questions i had were are there any other main item that i can use for a sump instead of another tank? what are some inexpensive things that i can use for the dividing part for the chambers for media, sumps water level ect, and i recently figured that a store bought overflow would not fit on my tank due to the glass cuts on the top of my tank, so what other ways could i make a overflow for the tank, and what other kinds of tubeing / piping can i use for the water return and feed. Also what are some other media i can use besides bio balls ive seen random threads talking about the "scrubbies" what else can be used? Thanks for all little bits of input you guys give !