Aquaponic Gardening: Growing Fish and Vegetables Together

What if I told you that you could catch fish for dinner right in your own backyard? And if you did, what if I told you that right up until you caught those fish, they were growing the veggies for the rest of your dinner? Would you believe me? You should! This is all withinreach using a new style of gardening called aquaponics.

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Aquaponics is, at its most basic level, the marriage of aquaculture (raising fish) and hydroponics (growing plants in water and without soil) together in one integrated system. The fish waste provides organic food for the growing plants and the plants naturally filter the water in which the fish live. The third and fourth critical, yet invisible actors in this symbiotic world are the beneficial bacteria and composting red worms. Think of them as the Conversion Team. The beneficial bacteria exist on every moist surface of an aquaponic system. They convert the ammonia from the fish waste that is toxic to the fish and useless to the plants, first into nitrites and then into nitrates. The nitrates are relatively harmless to the fish and most importantly, they make terrific plant food. At the same time, the worms convert the solid waste and decaying plant matter in your aquaponic system into vermicompost.
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Any type of fresh water fish works well in an aquaponic system. Tilapia is perhaps the most widely grown aquaponics fish, but aquaponic gardeners are also growing catfish, bluegill, trout, and even red-claw crayfish. Not interested in eating your fish? No problem! Koi, goldfish, and any decorative fresh-water fish you would purchase from a pet store work as well. In selecting your fish, however, you do want to pay attention to the temperature at which they both thrive and survive. Tilapia, for example, can survive down to temperatures in the low 60s, but they won’t thrive until they reach the mid 70’s. In contrast, trout will survive up to a maximum temperature of 65, but won’t thrive until their water is in the high 40s to low 50’s.

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There are also only a few limits to the types of plants you can grow in an aquaponics system. In fact, the only categories of plants that won’t thrive in an aquaponics system are plants like blueberries and azaleas that require an acidic environment to thrive. This is because aquaponic systems stay at a fairly neutral pH and therefore are a poor environment for plants requiring a pH of 4.0 – 5.0.

So can all of this work in any climate? Absolutely…with some protection. A backyard greenhouse is ideal because not only can you create an ideal environment for your fish and plants, but the sunlight is free! As an added bonus, all the water in the fish tank, sump tank and grow beds creates thermal mass in your greenhouse which helps moderate temperature extremes. If you aren’t fortunate enough to have a backyard greenhouse, you can also grow inside. Many aquapons have dedicated their garages and basements to their aquaponics systems!

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Here is the rest of the good news about aquaponics:

Aquaponic gardening enables home fish farming. You can now feel good about eating fish again.
Aquaponic gardening uses 90% less water than soil-based gardening because the water is re-circulated and only that which the plants take up or evaporates is ever replaced.
Aquaponic gardening results in two crops for one input (fish feed).
Aquaponic gardening is four to six times as productive on a square foot basis as soil-based gardening. This is because with aquaponic gardening, you can pack plants about twice as densely as you can in soil and the plants grow two to three times as fast as they do in soil.
Aquaponic systems only require a small amount of energy to run a pump and aeration for the fish. This energy can be provided through renewable methods.
Aquaponics does not rely on the availability of good soil, so it can be set up anywhere, including inner city parking lots, abandoned warehouses, schools, restaurants, home basements and garages.
Aquaponic gardening is free from weeds, watering and fertilizing concerns, and because it is done at a waist-high level, there is no back strain.

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Aquaponic gardening is necessarily organic. Natural fish waste provides all the food the plants need. Pesticides would be harmful to the fish so they are never used. Hormones, antibiotics, and other fish additives would be harmful to the plants so they are never used. And the result is every bit as flavorful as soil-based organic produce, with the added benefit of fresh fish for a safe, healthy source of protein.
Aquaponics is completely scalable. The same basic principles apply to a system based on a 10 gallon aquarium and to a commercial operation.

Aquaponic gardens are straight forward to set up and operate in your own backyard or home as long as you follow some basic guidelines. They can even be constructed using recycled materials, including old bathtubs and commercial containers used to ship liquid foodstuffs. Or purchase a system kit if you are not very DIY-inclined. The main point is to set up a system soon and become fish independent! There is simply no reason to rely on the fish counter anymore. Read more articles in our website about Aquaponics

http://www.thegardenprepper.com
By Sylvia Bernstein

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