The fish supply nutrients to a bed of plants, (called Grow Beds) and plants cleanse the water that the fish live in, creating a mutual advantageous environment for both. The only external input to the system is food for the fish.
Both Aquaponics systems compliment each other as a single unit, not as separate units.
The fish water is pumped to the Grow Beds, and is equally dispersed by a basic system of pipelines. The fish water feeds the plants, such as tomato’s, cucumbers, lettuce and various other green leafy vegetables, then filters with the grow bed that is filled with gravel / round river stones, lastly going back to the aquarium by gravity or by pump. The water is returned to the fish tank cleaned ready for use by the fish, and so the cycle continues.
So an Aquaponics system is comprised of a tank consisting of the fish of your choice, and a collection of Grow Beds for vegetable production.
What is amazing in Aquaponics, once the system has started, the water remains Ph well balanced and remains crystal clear.
The water is essentially recycled, with a small percentage of water added regular to compensate for what is lost by evaporation, and transpiration by the vegetables. For that reason Aquaponics makes use of only about 10 % of the water required for standard gardening or fish farming.
Earthworms can be raised to feed the fish and the earthworm compost is utilized in various other components of your garden. The worm farm is fed upon excess vegetable material from the Aquaponic system.