So I am just finishing up a fishless cycle for my first system. It's a 10 gallon fish tank and the design is based on the following: http://gardenpool.org/online-classes/introduction-to-shelfponics
For this system I don't plan to eat the fish or anything, just using this as a starter system to learn aquaponics. Most of the guides or articles that I've seen online are trying to help determine the amount of fish for much larger systems. I was planning on only doing goldfish and/or mystery snails from the pet store at least to start. Does anyone have a good rule of thumb that I can use to stock my tank now that I'm ready for fish?
For starting a small tank like this I would suggest going lite as small systems can have fast swings in water conditions. Use the typical aquarium recommendations for now and see if it works. I have actually packed in quite a bit more than recommended in a 10 gallon system, but it was a chore keeping everything right with the water, so start small and easy.
Start with 4 goldfish and expect half of them to die. You will get swings early on but things should settle down after a year or so. I have a 25 gallon tank with three goldfish no deaths in the last 3 years.