I need a diagram for a BC 8g sump

[chrisw4111]

Can anybody pass me a diagram of a sump sitting behind an 8g Biocube? I'm primarily concerned with intake and return, where and how to pull water, where and how to return it, where to drill holes, etc.
I have googled some diagrams so I have a general idea how this would work, pulling from chamber 1 of the BC and returning to chamber 3, but would like a drawing as a guide.
Also, will it be a problem if the pump in sump is rated different than the one in tank (106 gph vs. 160 gph)
Thanks

 

[chrisw4111]

My reasons for adding a sump are to add water, sand, and rock to the system, as well as a protein skimmer. In my biocube chambers I have cheato, some media bags, and a heater, all stuff that could go into the sump.
So if I empty out the chambers they become useless, correct? Meaning, as illogical as the whole process would end up being, that theoretically I could end up removing all the chamber walls to add space to my display area.

 

[chrisw4111]

I've done a lot reading on sumps in general and it looks like most all of them feed the sump from an overflow container. Is this a must, I couldn't attach an overflow without taking the hood off, which I don't want to do.
Regarding the 2 tube system where one pump pumps water out of chamber 3 down to the sump, then another pump pumps water back up to the tank, I took a good look at the structure I think the best idea is to cut a hole out of the bottom of the lid the size of the tubes. The tubes will rest on the rim of the tank near chamber 3 and when the lid is closed the holes provide clearance for them. I would rather go without a sump than try to drill through glass.
Assuming the sump is 3 feet below the tank, will one 160 gph pump be enough for the entire system to flow effectively? If so where should it be located?
And most important, is a sump even worth the trouble when my filtration is already pretty good, and I'm doing weekly water changes?

 

[posiden]

So much to be adressed in your posts.
Since drilling the glass is out, as well as cutting the top for plumbing to pass. Your stuck with what the bio cube can offer. Scrape off the paint on the back of the center chamber and place a light behind the tank. You can then grow cheato in the back and not mod the top any. Some put LR in there but I don't like it. That's just me.
The perment tray in chamber 1....pull it out. A lot of gunk gets trapped under that tray. Take your time and work through it and you will get it out.
On your other thoughts,
Do not pump water out of the tank to a sump/refuge to use another pump to return it to the display. "IF" you do manage to get them to pump at the same rate.......it wont be for long. Not to mention the flood disaster your asking for.
If you want to add something externial, you gonna have to give on either drilling or moding the top.
Your question about a 160GPH pump being good enough for your tank. This depends on what pump and how you plumbed the return from said sump 3 feet below the display. Lots of things will determine this answer.
All in all, I think you will best be served with the fuge mod to the exsiting chambers of the Bio Cube.
HTH.