Fish That Are Commonly Used In Aquaponics

fish

Aquaponics is a hydroculture system which combines hyroponics with aquaculture. Aquaculture involves the rearing of various aquatic animals in a resevior of water. The aquatic animals are often fish. The type of fish that are used in the aquaculture component of aquaponics, are commonly of the freshwater variety. These include tilapia, catfish, trout, perch, oscars, koi and goldfish.

Tilapia are often used in commercial aquapoinics, if the fish is to be of the edible variety. Tilapia are also commonly used in home based aquaponics systems as well. They thrive well in closed environments like that of an aquaculture system. These fish grow fast and reproduce quickly. They are also able to thrive in a high density fish environment like that which is required in aquaponics.

Fish such as oscars, koi and goldfish are also commonly used in home based aquaponics. They can be mixed together along with the tilapia. They thrive well together, sharing the same environment. These types of fish require the same food and same levels of oxygen in the water.

Catfish also do well in an aquaponics environment and are commonly used in the United States. Catfish, unlike tilapia, are able to survive in water that goes through changes in temperature. They can survive in both cold and warm water. Catfish are edible and grow fast.

Trout are also used in aquaponics, but these fish require water temperatures that are much cooler than the 20 to 25 degree celsius found in a tilapia fish tank. The temperature of the water needs to be 15 degrees celsius or colder. Trout need very clean water to thrive in.

Deciding which type of fish you should stock your fish tank with is an important step in creating a fully functional aquaponics system. Having access to an aquaponics system resource that can give advice in this area would be helpful.

How Aquaponic Gardening Is Better Than Traditional Gardening

Aquaponics gardening is a terrific way to grow your own organic veggies and chemical free fish. It is a sustainable food production system that combines a traditional aquaculture with hydroponics in a symbiotic environment. In the aquaculture, effluents accumulate in the water, increasing toxicity for the fish. This water is led to a hydroponic system where the by-products from the aquaculture are filtered out by the plants as vital nutrients, after which the cleansed water is recirculated back to the animals. The term aquaponics is a portmanteau of the terms aquaculture and hydroponic. Aquaponic systems vary in size from small indoor or outdoor units to large commercial units, using the same technology. The systems usually contain fresh water, but salt water systems are plausible depending on the type of aquatic animal and which plants.

Unlike traditional gardening, there is no constant manual watering or soil used in aquaponics gardening systems. Instead, there are two main parts in the aquaponics system which is the rearing tank for the fish and the hydroponics subsystem for growing plants. The hydroponics subsystem is the portion of the system that allows the roots of plants to be immersed in nutrient rich water that comes from the rearing tank. The waste from the rearing tank contains vital nutrients that are similar to traditional gardening fertilizers. This system does not require constant maintenance like a traditional garden. Nitrification, the aerobic conversion of ammonia into nitrates, is one of the most important functions in an aquaponics system as it reduces the toxicity of the water for fish, and allows the resulting nitrate compounds to be removed by the plants for nourishment. Ammonia is steadily released into the water through the excreta and gills of fish as a product of their metabolism, but must be filtered out of the water since higher concentrations of ammonia can kill fish. Although plants can absorb ammonia from the water to some degree, nitrates are assimilated more easily, thereby efficiently reducing the toxicity of the water for fish.

Aquaponic systems do not typically discharge or exchange water under normal operation, but instead recirculate and reuse water very effectively. The system relies on the relationship between the animals and the plants to maintain a stable aquatic environment that experience a minimum of fluctuation in ambient nutrient and oxygen levels. Water is only added to replace water loss from absorption and transpiration by plants, evaporation into the air from surface water, overflow from the system from rainfall, and removal of biomass such as settled solid wastes from the system. As a result, aquaponics uses approximately 2% of the water that a conventionally irrigated farm requires for the same vegetable production.This allows for aquaponic production of both crops and fish in areas where water or fertile land is scarce.

Aquaponic systems can also be used to replicate controlled wetland conditions that are useful for water treatment by reclaiming potable water from typical household sewage. The nutrient-filled overflow water can be accumulated in catchment tanks, and reused to accelerate growth of crops planted in soil, or it may be pumped back into the aquaponic system to top up the water level. In terms of outputs, an aquaponics system may continually yield plants such as vegetables grown in hydroponics, and edible aquatic species raised in an aquaculture.