Value potential redok pond bottom mud showed that soil conditions can be used to follow the progress of chemical reactions and biological phenomena in the pond. With redox potential negative value indicates the reduction reaction, which can produce compounds that are toxic to shrimp like compound sulphide (H₂S), nitrite and ammonia. Therefore, it is important to observe basic mud during maintenance to determine the treatment.
Conditions pond bottom mud during maintenance is also determined by additional feed management. Feed management should be done well. This is because the operational costs for feed in shrimp farming is huge. The impact of uncontrolled use of feed will also cause a worsening of environmental problems in ponds and can eventually lead to the emergence of diseases and death.
Measurement redok pond bottom soil is done every 2 weeks. If the value has reached -100 mV redox showed a reduction reaction that is expected to produce toxic nitrite and sulfide compounds at acidic pH and ammonia at alkaline pH. Actions that can be done when redok potential has reached approximately -100 mV is by increasing the dissolved oxygen content in the pond bottom.
The increase in dissolved oxygen can be carried out by aeration or by pumping. Another way is by adjusting the pH of water in the range of 7.8 to 8.5. Application of bacterial decomposition can routinely accelerate the decomposition of organic material in the bottom mud.
The condition of water quality parameters can be measured by the content of total organic matter (TOM) or the number of N-organic in water. Increased content of N-organic due to the unconsumed feed consumption, shrimp feces, dead plankton or other aquatic plants, and organic materials that go at the turn of the water. High organic matter content of more than 60 ppm showed declining water quality.
The reform process organic materials can not take place perfectly. The total content of organic matter is a source of the compound that can poison shrimp in the anaerobic process or a reduction reaction. Measurement of organic material every week either on the plot or plots enlargement shrimp tank. If the pond water content at 50 ppm it is necessary to decrease, namely by way of replacement or addition of water from reservoir plot.
This can be done if the tendon swath lower organic matter content. Another way is by stocking probiotic Bacillus sp and sp Rodobacter routinely every 3 days with a dose of 1-2 ppm to accelerate the decomposition of organic matter. Treat others to prevent this process by creating aerobic conditions by maintaining dissolved oxygen remains high at more than 4 ppm.
Decomposition of organic matter will take place properly if the composition of the C / N ratio in the organic materials are more than 10. Therefore necessary to add a carbon source (C-organic). Source C-organic materials used are carbohydrates such as starch, flour and others. Applications carbohydrate ingredients given 1-2 times per week. The dose is 10% of the total protein (crude protein) from the commercial feed has been given. As a result of this treatment is the decline in organic matter and plankton growth that is marked in green.