Not only fish but also all animals, must obtain oxygen from the environment for respiration. Oxygen is far less available to aquatic organisms than it is to air-breathers, and the dissolved oxygen content of water may limit the activities of fish. In most natural waters, the supply of oxygen to water (diffusion from the atmosphere and production from underwater photosynthesis) exceeds the amount used in oxygen-consuming processes, and fish seldom have problems obtaining enough oxygen to meet normal metabolic demands.
In aquaculture ponds, however, the biomass of plants, animals and microbes is much greater than in natural waters, so oxygen is sometimes consumed faster than it is replenished. Depending on how low the dissolved oxygen concentration is and how long it remains low, fish may consume less feed, grow more slowly, convert feed less efficiently, be more susceptible to infectious diseases, or suffocate and die. Aqua culturists avoid these problems by aerating ponds mechanically to supplement normal oxygen supplies.
Not only fish but also all animals, must obtain oxygen from the environment for respiration. Oxygen is far less available to aquatic organisms than it is to air-breathers, and the dissolved oxygen content of water may limit the activities of fish. In most natural waters, the supply of oxygen to water (diffusion from the atmosphere and production from underwater photosynthesis) exceeds the amount used in oxygen-consuming processes, and fish seldom have problems obtaining enough oxygen to meet normal metabolic demands.
In aquaculture ponds, however, the biomass of plants, animals and microbes is much greater than in natural waters, so oxygen is sometimes consumed faster than it is replenished. Depending on how low the dissolved oxygen concentration is and how long it remains low, fish may consume less feed, grow more slowly, convert feed less efficiently, be more susceptible to infectious diseases, or suffocate and die. Aqua culturists avoid these problems by aerating ponds mechanically to supplement normal oxygen supplies.
An Overview of Aquaponic Systems: Hydroponic
Components
D. Allen Pattillo
Iowa State University, pattillo@iastate.edu
http://lib.dr.iastate.edu/ncrac_techbulletins/19/
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Abstract: One of the problems of fish farming in ponds is the dissolved oxygen (DO) concentration
in water. Lack of dissolved oxygen from just a few feet below the surface of the pond causes fish to
swim on the water surface. Fish may die either from warm water where oxygen becomes less soluble at
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bloodstream. The best way to control or eliminate the causes of fish kill is to ensure that there is
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project also known as SPAS-500 was conducted. It is a self-contained unit that floats on the water and
provides consistent levels of oxygen using the venturi air ejector technology. It directly uses the
collected energy from the sun during daytime and the stored energy of the batteries at night time.
The method of the evaluation was based on the data gathered from the hydrological and electrical
application of the system. Varied methods of computations and testing as well as measuring
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Aquarium accessories ppt. To understand various types of aquarium accessories
1. TOPIC “AQUARIUM ACCESSORIES AND
EQUIPMENTS
Session-2023-24
Name- Mukta Manjari Sahoo
Regd.no.- 230705180023
M.Sc 1st year Zoology
Subject:- Ornamental Aquaculture
Guided by-Dr.Yashaswi Nayak
School of Applied Sciences, CUTM, BBSR
2. CONTENTS
• Introduction
• Aquarium accessories for small scale Units
• Accessories for fish tanks: Hood, stand, light source,
heaters, air pump accessories, filter and hand nets.
• Aquarium accessories for large scale Units
Aeration device, pumps and pipe lines, other
equipment and accessories, food and feed production
units.
• Conclusion
• References
3. INTRODUCTION
• A person maintaining ornamental fishes in his house/work place may
need only limited equipment and accessories.
• On the other hand an entrepreneur may need a lot of equipment and
accessories to satisfy his customer’s needs.
• An aquarium, as seen in the picture, is a tank where in all water creature
such as fishes, rocks that fishes need for shelter, plants that they used as
food and many more. (Fig;1)
Fig;1 Aquarium
4. Equipment and accessories needed for small scale
ornamental fish farm
Glass /fibre glass tank:
• A small tank made of sheet glass/float glass or transparent fibre
glass may be kept in a strong stand made of wood, steel etc.
• To prevent accumulation of dust particles a hood may be provided.
Such hoods will serve as ‘lid’ for the tank. (Fig;2)
Fig;2 Fibre glass tank
5. Accessories for fish tanks
To beautify aquarium tank, various accessories are used depending on
one’s taste and affordability.
They are as follows :
Hood : An enclosure housing light fixtures for aquarium illumination,
usually incorporating a cover for the entire tank.
Hood or tank cover is made of glass, wood or tin plate. (Fig;3)
Fig;3 Aquarium Hood Cover
6. Cont....
Stand : A support for an aquarium tank, usually not enclosed below
the tank. To keep aquarium tank in position a stand made of wood
or metal is required. It must be capable of carrying the weight of
tank. (Fig;4)
Fig;4 Aquarium Stand
7. Light Source : Aquarium lights to be fixed inside the hood give bright
illumination to the inner environment and help to maintain healthy
plants and fishes. Lamps may be fluorescent tubes, mercury vapour
lamps or metal halide lamps. Lighting for 10 to 15 hours a day is
considered sufficient for an aquarium of 5 l capacity a lamp with 10
watt is enough. (Fig;5)
Fig;5 Light sources
8. Heaters : Heaters are required in cool places where the temperature is
less especially during night hours. Heating is most commonly done by
using immersion heaters with adjustable thermostat.(Fig;6)
Fig 6; 200 watts Aquarium Heater
9. Air Pumps and Accessories : In order to keep good water quality in
the ornamental tanks and for maintaining the fish in a healthy
manner, oxygenation of water is very important. For this purpose, air
pumps costing Rs.200 to 500 per piece are available in the market.
Air tubes and controlling devices are also needed to regulate the
airflow to the system. Air stones are useful for production of small air
bubbles and for efficient oxygenation.(Fig; 7)
Fig 7; Air Pumps
10. Filter : Aquarium filters remove physical and soluble chemical waste
products from aquaria, simplifying maintenance. Furthermore,
aquarium filters are necessary to support life as aquaria are relatively
small, closed volumes of water compared to the natural environment
of most fish.(Fig;8)
Fig 8; Hanging Filter
11. Hand Nets : To handle ornamental fishes without subjecting them to
injury/diseases, hand nets are very important.
Hand nets made of mosquito nets or velon screen or bolting silk are in
common use. The brood stock of ornamental fish should normally be
handled by hand nets made of velon screen . (Fig;9)
Fig 9; Hand Net
12. Aquarium accessories and equipment
for large scale units
Aeration Devices :
• Various air pumps benefit fish by allowing them more oxygen to
breathe.
• Aeration can actually increase the pH (make it less acidic).
• It also helps to maintain water quality and circulation. They can be
mainly classified as surface aerators, diffuser aerators and turbine
aerators. (Fig;10)
Fig 10; Aeration Device
13. Pumps and pipe lines :
• Aquarium pumps, pump air into a tank's tubing. through
airline tubing
• Cooling/Heating water to provide the optimal water
temperature level.(Fig;11)
Fig 11; Aquarium Pump
14. Other Equipment And Accessories
01
02
03
04
Fish transportation tins
Ornamental fish seeds
Polythene bags
Oxygen cylinder
Pressure gauge
Cloth/bolting silk/velon screen
Algae scraper,
Bucket
15. Food / feed production units
Feed and
food units
Pulverizer
Pelletizer Crumbler
Live feed
Micro
encapsul
ated feed
Pellet
feed
Feed
Additives