I am using the grow beds from the Friendly Aquaponics Micro System 64 and 128.
The FAP Micro System 64 and 128 plans cost $99 and come with great info about aquaponics and system DIY.
Here are some pictures of the grow beds.
I put a faucet on the pump return line that goes to the fish tank. I use it to but system water on the seedlings in the raft or to get system water into a bucket when I mix nutrients or supplements to add to the system.
Here is my daughter and grand son planting our first seedlings July 10, 2011.
You can see some of the 1 & 1/2″ plumbing I ran between the two troughs and buried.