I just love the idea of growing my own veggies and fish in my yard. I am looking into it in the near future. When I found what Aquaponics was about, I felt so impressed. Did you know that ammonia secreted by fish can be decomposed by bacteria into nitrites and nitrates and absorbed by your plants from almost all kinds of media like gravel? Also, you can use the same water you used to feed your plants back into your fish pond, now without ammonia that would kill you fish otherwise, and oxygenated. This create a wonderful recycling of the water. You don't have to use chemicals for your food and they grow incredibly fast. I am planning to grow tilapia fish and some vegetables in the near future. What do you think about this?