Melissa - Thanks. No I didn't build it, I was gonna outta a 20Long but thats now my fuge. I bought that sump on Ebay brand new it was I think $124.99 It is an Amirical Sea Reef 100b. I removed the bio media, and drilled for a 1in bulkhead to hook to the pump, and while I was at it I thought drill another and put a spigot on it so I can hook a hose to it run to the sump pump (It's in my room in basement) to drain when needed or for water changes. Wazzal is 100% correct it need not be fancy you could use a 10Gal AGA from the LFS for 10 bucks get som 1/4 inch Acrylic from Home Depot some weld on, some surgical gloves, a 6 pack and violent movie going in background, and have lot's -o- fun. Deffinately have LFS or Glass shop drill if you go that rout. I couldn't find any where to get my tank drilled here in good old Harford County Maryland so I got myself an external Amiricle U-Tube type overflow from That Fish Place for $48.95. Well Mom got it for a presant whilest Dad was in France on buisness. Should've seen her face when we walked in there, jaw dropped she say's "This place is bigger then Price Club". Yeah if I was you I'd grab a 10 or 20 gallon tank and convert away. Check out some DIY sites they are great and also the DIY forum here. You may also look on the for sale forum here I found one there a nice one too for $50 bucks, the day after I bought mine. Anyway I hope this is at least a little bit of help.
Sincerly,
Sean
ps Here is my fuge before it was filled the thing in it is a UFG covered in screen to be a Jaubert Plenum.