Fish is one of the main sources of protein. Bangladesh is one of the major fish producing countries in the world. In most cases, the farmer follows traditional fish farming methods. They use chemicals as growth promoters or for emergency situations that have various side effects. Hence, with the increasing demand for fish production as a food source, knowledge of the fish farming system is expected to increase. Fish farming presents various problems, especially the problem of oxygen dissolution (DO). These problems can be eliminated by using aeration. In our thesis, we tried to show how to carry out intensive fish farming through the aeration process in both on grid and off grid modes. We have found that if you can maintain the necessary level of Do in the water, the fish production rate will increase. In our project we carried out an experiment to estimate the increase in DO level if water is spread into the pond. Aeration not only increases the oxygen level but also eliminates several harmful elements such as ammonia gas. Since the molecular mass of ammonia is less than the molecular mass of the atmosphere, the aeration process helps dissipate the ammonia gas. We have found that it is possible to increase fish production by 200% to 600% compared to the conventional method. In our work, we derived the formula to estimate the dissolved oxygen and energy required to pump water for aeration in the fish pond. From the point of view of the impact of climate change, Bangladesh is one of the most insecure countries. Say no to plagiarism. Get a tailor-made essay on "Why Violent Video Games Shouldn't Be Banned"? Get an original essay The situation will further improve due to excessive and unplanned dependence on fossil fuels. In our country, renewable energy currently contributes only 2.89% to total electricity production. Among all forms of renewable energy sources, solar energy has the best prospects in our country. The government has already set a target to increase the renewable energy generation capacity to 2,829.68 MW by 2021. In our country until now solar PV has only been used in homes or rural lighting, fans and shops , but it is not notable on an industrial scale. But in a big way we can use it in the agricultural sector and therefore in fish farming. Even less used in irrigation and poultry farming but very limited in fish farming. The former currently rely on 266,000 electric water pumps to irrigate nearly 1.7 million acres of land and 3 million diesel pumps to irrigate 8.4 million acres of land using nearly one million tons of fuel. Aeration can be done in several ways. By using solar photovoltaic, an economical solution can be introduced. Rural areas often do not receive sufficient electricity and fuel costs are becoming increasingly prohibitive. Since the cost of solar panels is decreasing, in the future every village may be able to install solar panels and be able to generate adequate energy for irrigation. From the point of view of the impact of climate change, Bangladesh is one of the most insecure countries. The situation will further worsen due to excessive and unplanned dependence on fossil fuels. In our country, renewable energy currently contributes only 2.89% to total electricity production. Among all forms of renewable energy sources, solar energy has the best prospects in our country. The government has already set the target ofincrease the renewable energy generation capacity to 2,829.68 MW by 2021. In our country until now solar photovoltaic has only been used in homes or rural lighting, fans and shops, but it is not notable on an industrial scale. But in a big way we can use it in the agricultural sector and therefore in fish farming. Even less used in irrigation and poultry farming but very limited in fish farming. The former currently rely on 266,000 electric water pumps to irrigate nearly 1.7 million acres of land and 0.3 million diesel pumps to irrigate 8.4 million acres of land using nearly one million tons of fuel. Aeration can be done in several ways. By using solar photovoltaic, an economical solution can be introduced. Rural areas often do not receive sufficient electricity and fuel costs are becoming increasingly prohibitive. Since the cost of solar panels is decreasing, in the future every village may be able to install solar panels and be able to generate adequate energy for irrigation. Bangladesh is one of these major fish producing country in the world with a total production of 41.34 tonnes. The figure shows the last ten years (average) growth of this sector which is almost 5.43% and the government is trying to maintain this growth. In Bangladesh, around 50% of farmers have received experience in fish farming from their neighbors and 33% have acquired it by attending formal training provided by different organizations such as NGOs, DoF and BFRI. Most of them use chemicals, artificial waves, water recycling for cultivation, which is not reliable enough for intensive agriculture. From the fig: It can be shown that China is the largest fish producing country with 79,389 (MT), or almost 38% of the world total per capita. Our neighboring country India contributes 11% with a total production of 22,215 (MT). Vietnam shows a surprising production of 6,208 tonnes (3%). Where Bangladesh shares only 2% of the world's per capita. So we have an attractive opportunity to enhance this sector. The process of maintaining or increasing the saturation level of water in both artificial and natural environments is called Aeration. In this process the hydrogen peroxide is diversified by the circulation of water around the aerator. This method causes thermal and chemical desertification. The amount of water created by this process helps support high oxygen transmission efficiency because the new hydrogen peroxide is replaced by lower dissolving hydrogen peroxide. We made a setup for our experimental purpose to observe the behavior of oxygen in water. For this experimental purpose we took 100 l of water in a plastic drum. We used a hand-made shower to convert water into droplets so that the collective surface area can increase and consume more oxygen. We circulated water from two different heights of 1.2 m and 0.6 m to determine whether oxygen remains in contact with the water and whether DO reaches the saturation level (7.5 mg/L) quickly or less. To measure DO in water we used the DO meter. The DO water model is PDO-519 manufactured by Lutron. During data collection we also recorded the water temperature shown in the DO meter. The temperature was almost constant in both cases. In our experiment, after every 50 liters of water circulation, we recorded the DO and listed it in the table in both cases. We had to circulate the water 2.5 times from a height of 1.2 meters and 4 times from a height of 0.6 meters. From the graph.