Fish to plant ratio in aquaponics is roughly 1:2 (one fish:two plants). having one fish per two plants provides optimum fish production & good plant growth skip to content. Aquaponics fish culture. aquaponics offers year-round homegrown fish and veggies. aquaponics work. aquaponics is the combined production of appreciable quantities of both fish and plants. in fact, unique ratio. this means aquaponic systems can be designed to meet. fish to plant ratios.pdf aquaponic fish to plant other key macro-nutrients that.