What Is Aquaponics?
Aquaponics – the combination of aquaculture and hydroponics – is
growing in popularity worldwide as a direct response to the increasing amount
of harmful substances found in our food supply.
Did you know that, here in the United States, only about 10% of the
farmed fish we consume is produced domestically? China produces 62% of the
world’s farm-raised fish today. The desire to eat home-grown, chemical-free
food is driving more and more people to implement their own aquaponics systems.
If you’re just getting started, you may have some questions –
and we’d like to help you answer them!
- What Is Aquaculture? Aquaculture refers to the practice of raising aquatic animals
and/or the cultivation of aquatic plants.
- What Is Hydroponics? Hydroponics is the process of growing plants in sand, gravel or
liquid with added nutrients – but without soil.
- Why Do People Combine the Two? Hydroponics requires
often expensive nutrients to feed the plants, and it requires periodic flushing
of the liquid-based systems to expel wastes. In aquaculture, a re-circulating
system needs to have excess waste removed on a daily basis, which usually means
removing some of the water. Coincidentally, the nutrients that are needed by
the plants are the very waste products expelled by the fish. Thus, combining
the two systems is a rare case of turning two negatives into a positive … and
that positive is called aquaponics.
How Does It Work?
Aquaponics is the combination of a traditional aquaculture
environment (raising aquatic animals such as fish, prawns or crustaceans in
tanks) and a hydroponics system (cultivating plants in water) into one
symbiotic environment. In an aquaponics solution, fish and plants are farmed
together in a single interconnected and mutually beneficial environment.
Simply put, fish produce waste products that include nitrates
and ammonia. These waste products aren’t healthy for the fish … but they make a
wonderful natural fertilizer for plants. As the plants absorb these nutrients,
they purify the water, which can then be re-circulated to the fish.
Along with the water containing the fish waste, microbes play an
important role in plant nutrition. These beneficial bacteria gather in spaces
between the roots of the plants and they assist in converting the fish waste into
substances the plants can use to grow strong and healthy.
No chemical or synthetic pesticides, herbicides or fertilizers
can be used. To do so would kill the fish. This is something that even
traditional organic farms cannot claim as most need to supplement their soil
with fertilizers which can be bad for the overall health of the soil and the
watershed. Aquaponics doesn’t use soil, so this is not necessary. Therefore, the result is a perfect and very
natural collaboration between aquaculture and non-soil-based gardening. The
resulting food is 100% chemical-free and as all-natural as it gets.
Creating the Right Aquaponics Environment
Many people are concerned about water usage. Surprisingly, very
little water is used in an aquaponics system. Because of the re-circulating
nature of the system, very high stocking densities of fish can be grown using
very little water. A much more important factor to consider is the environment
the system will operate in as well as the infrastructure you will need to compensate
for temperature fluctuations.
The amount of sunlight, the ambient temperature, rainfall and
wind are all crucial factors in producing a healthy plant. If you decide to
grow outdoors, choose varieties of vegetables that will grow best in your
climate. To mitigate these factors, you could use a greenhouse or an indoor
Grow beds filled with a media such as gravel or expanded clay
pebbles are common methods for growing plants in an aquaponics system, but
there are many different methods that can be used. One of the great things
about aquaponics is that, unlike traditional gardening, aquaponics allows you
to plant crops at any time of the year, yet the kinds of plants you can grow
are similar to those grown via any other method of farming.
Another plus: The aquaponics system does most of the labor that
would be required in ordinary in-ground growing operations. When done
correctly, you should be able to maintain a constantly rotating supply of
organic, pesticide-free vegetables that can continue to produce indefinitely in
a properly maintained system, and you should yield more produce from an
aquaponics solution than you would from produce grown conventionally in the
ground. In fact, vegetables often grow significantly faster and at three to
four times the density than those grown in the ground, and with an aquaponics
system, they do so without depleting the natural environment’s nutrients.
There are huge lists of plants that can be successfully grown in
an aquaponics system, but basically anything that can grow well above soil and
loves to have its roots wet is a great candidate. Plants such as lettuce,
cucumbers, tomatoes, and leafy green vegetables thrive well in aquaponics
environments. Root crops, however, do
The environment you create will be the most important factor in
determining the kinds of fish or crustaceans you will be able to raise. Some
species thrive in cold water while others prefer warmer water. Be sure to
choose a species of fish that is both hardy and adaptable to the indoor or
outdoor conditions you have created.
Remember, too, that you can adjust for temperature by adding water
heaters or chillers to your tank if a specific species is desired.
Choosing Your Fish
Many people choose to grow just one species. However, when it comes to mixing species in a
single aquaponics system, it is important to choose varieties that are able to
cohabitate with one another. Some species adapt well to cohabitation while
others prefer a mono-species environment.
The first step in choosing fish that will live together well is
to choose species with similar requirements for temperature and water
conditions. It is also important to think about the purpose for the fish you
choose. For example, some fish are selected to be raised and eaten while others
are simply added to the system to provide nutrients for the plants. Koi and
goldfish, for example, are not considered good for eating, though they are
beautiful and decorative additions to an aquaponics system built strictly for
If you are interested in harvesting fish as well as plants from
your aquaponics system, consider popular species such as Tilapia, Catfish,
Bluegill, Bass or a crustacean like Redclaw Crayfish or Prawns.
Tilapia: In practice, Tilapia are the most popular fish for both home
and commercial projects intended to raise fish as food because it is a
warm-water fish that can tolerate crowding and changing water conditions well.
We have many different species available to suit a variety of growing
Bluegill: If you want something that is ok in warm water and even in
near-freezing or frozen water – and eats just about anything – consider
Redclaw Crayfish: Interested in crustaceans? Take a look at the Redclaw
Crayfish. We believe that Redclaw Crayfish are the future of local,
sustainable, healthy “seafood” in America, and that this beautiful little
crustacean has the potential to become a mainstream premium seafood product in
just a few short years. Note: It is important to note that some states do
not allow Redclaw Crayfish to be grown; in Florida, where we are located, you
must have a Florida aquaculture permit to grow them.
Why Raise Redclaw Crayfish?
Redclaw crayfish are amazing! They are the ultimate in sustainable
healthy, nutritious “seafood.”
- Low Sodium
- Low Cholesterol
- Low Fat
- No Heavy Metals
(Unlike Ocean Lobsters)
- Organic (Depending on What
You Feed Them)
In our opinion, any aquaponics system running at a minimum of 70˚
F that does not contain Redclaw Crayfish is missing a huge opportunity! Not
only with the Redclaw Crayfish produce a delicious additional crop alongside
your fish and vegetables, but the waste they produce during regular moulting
will enrich the water with minerals that will send your crop production into overdrive
– a word we use to describe this is “lobsterponics.”
Redclaw Crayfish do well in water temperatures ranging from 55˚ -
95˚ F, but do best at around 80˚ F. They grow fast and breed well in most
circumstances, particularly when the water is well aerated and moving.
Please note that we do not recommend stocking Redclaw Crayfish
and aquaponics fish in the same tank unless they are separated by a grill or
mesh as Redclaw Crayfish are very vulnerable when they moult. They will grow to
table size in nine to 12 months.
If you have an aquarium, a Redclaw Crayfish makes a stunning
centerpiece and will provide hours of interesting viewing for enthusiasts. They
will happily co-exist with small aquarium minnow fish and pleco, but again, please
do not house them alongside predatory fish as they are quite vulnerable during
Cold-Tolerant Fish Species
- Koi: Can survive in temperatures ranging from 35˚ - 85˚ F; optimal
temperatures range from 55˚ - 75˚F
- Channel Catfish: Can survive in temperatures ranging from just above freezing -
100˚ F; optimal temperatures range from 75˚ - 86˚ F
- Bluegill: Can survive in temperatures ranging from 39˚ - 90˚ F; optimal
temperatures range from 60˚ - 80˚ F
- Largemouth Bass: Can survive in temperatures ranging from 60˚ - 96˚ F; optimal
temperatures range from 65˚ - 75˚ F
Tropical Fish & Crustacean Species
- Tilapia: Can survive in temperatures ranging from 55˚ - 100˚ F; optimal
temperatures range from 60˚ - 85˚ F
- Redclaw Crayfish: Can survive in temperatures ranging from 55˚ - 95˚ F; optimal
temperatures range from 77˚ - 90˚ F
- Prawns: Can survive in temperatures ranging from 57˚ - 105˚ F; optimal
temperatures range from 78˚ - 88˚ F
Questions? Contact us at firstname.lastname@example.org
for more information.