The best methods I have seen and used is a 3 stage filtration system 1. vortex radial flow tank to capture large waste deposits. 2. moving bed bio medium filter 3. sump tank. I am going to take you all the way to Austrailia for a prime example of a quality aquaponic setup as I don't have videos or anything about my old setup which is practically identical to this guys system
I always kick a new system off using goldfish. They are cheap and easy to replace, and they make the same ammonia as every other fish. Depending on your water supply some of your fish will probably die. I used Youtube to find out everything I would need, and how to build it. You'll rarely run into a problem that someone else hasn't fixed then posted a video about.