Pool cross section
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POND PREPARATION BEFORE FISH FRIES RELEASE
1. Drain the water from the pond to prevent death from infection.
2. Remove the mud from the bottom of the pond because it will reduce quality of water. In addition, remove all water plants that do not benefit the fish.
3. Sprinkle limestone on the bed, banks and pool limits. Allow at least 2 weeks in the sun. Benefits of application are:
a. Increase the water pH
b. Hardening the bottom of the pond
c. Eliminate parasitic (disease), an enemy fish and plants are not required.
d. The decomposition process organic matter will increase fertility pond.
e. Accelerate the harden process of excessive sediment organic matter in the water.
Soil pH and type of limestone usage table
pH
|
below
4
|
4
– 4.5
|
4.5
– 4.0
|
5.0
– 5.5
|
5.5
– 6
|
6
– 6.5
|
Kg/ha
|
||||||
Limestone, CaMg (CO)
|
3805
|
3044
|
2283
|
1902
|
1012
|
888
|
CaO2
(Quicklime/ Burnt Lime)
|
2917
|
2283
|
1776
|
1395
|
761
|
634
|
Ca (OH)2
(Hydrated/ Slake Lime)
|
1903
|
1522
|
1142
|
1015
|
507
|
507
|
Tilapia pool covered with limestone
f. After the bottom of the pond dry and cracked, water is introduced into the pool
Pool : Driedun till the bottom is cracked
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g. After at least 1/3 ponds full of water, fertilizer applied to fertilize fish ponds in content plankton (natural fish food). Water fertilizer sowing rate by type is as follows
Fertilizer type
|
Recommended Rate
|
Phosphate
|
|
i.
Double
Superphosphate (DSP)
|
400 kg/ ha/ year
|
ii.
Triple
Super Phosphate (TSP)”
|
340 kg/ ha/ year
|
Nitrogen
|
|
i.
Amonium
Sulfate
|
80 kg/ ha/ year
|
ii.
Amonium
Nitrate
|
1,350 kg/ ha/ year
|
iii.
Amonium
liquor
|
550 kg/ ha/ year
|
iv.
Urea
|
67 kg/ ha/ year
|
h. After the fertilizing process, the pond left for least two weeks until the water turns green
Tilapia pond : green color water
i. Then the quality of the water tested to fit the requirements as appropriate as follows:
Parameter
|
Desired Value
|
i. Dissolved Oxygen (D.O)
|
More than 2.5 ppm
|
ii. CO2
|
Less Than 25 ppm
|
iii. pH
|
6
– 8
|
iv. Water Temp
|
20
– 35oC (optimum 28 – 32oC)
|
v. Ammonia
|
Less Than 1.0 ppm
|
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