Here are some pictures of my DIY Ebb & Flow setup. The mixing tubs can be found at your local Lowes or Home Depot (
http://www.lowes.com/ProductDisplay...gId=10051&cmRelshp=sim&rel=nofollow&cId=PDIO1), they cost $13 and are good for about 15 gallons. I wish I could have an even 20 gallons of res water but I needed something low profile and these work great. The dimensions of the table are 14"x41"x26". The height of 14 inches is only referring to the corners and not including the 2x4s supporting the tray.
Other than the mixing tubs and some wood, you'll need a pump (I use 250 gph), the flood and drain pieces for your upper tray (
http://www.discount-hydro.com/productdisp.php?pid=185&navid=10), and if you noticed, I also have a male end with a tube coming out of the reservoir. This tube can be lowered to drain the res down the drain without having to actually move the reservoir from under the table.
I've also stapled cardboard to the open areas around the table to keep the evaporation rate lower, to keep light out, and to keep humidity down. As you can see by the first pic, I just use a trash bag to cover the front of the tray. Pretty ghetto but it works.