Small diy aquaponics system: this is a small aquaponics system i built so i could experiment with the concept. if it works out well for me i'd love to build a large version of this system but before i do want some working knowledge of how it works and any problems i might encou…. I love aquaponics systems which can fit into almost any space and take only a few resources to bring the whole idea together. with this system, you place a fish tank on the bottom shelf. place trays with grow media on each shelf above the tank. pipe the system together, and you’re ready to start growing your own food. 11..