Tank Freshwater Prawn Culture

original ideas: culture baby freshwater prawn udang galah inside simple tanks either poly, concrete or fibre material.

duration: 1 month

setting up: 2 nos x 100 gallon poly tank, 3 nos bubble blower, 2 nos simple pumps and change water every 3 days, 8 nos of pipe shelter using green nets

findings:

• high content of sludge building up at the bottom of the tanks
• high ammonia content at tank bottom
• simple pump do not have enough suction power to filter the sludge
• 100 gallon of water is not sufficient to cater large numbers of freshwater prawn udang galah

solution:

1. larger tank with efficient suction power but gentle enough for the baby prawn
2. Water should be change at least 20% every 2 days
3. bio filter system should be consider as used in koi pond
4. bottom of tanks should be able or have drain outlet
5. high pressure blower with aero-tube should be use
6. tank should be place higher to make draining bottom sludge more easily
7. department of fisheries should have the technology as used in the hatchery complex

pro & cons:

• saving valuable lands and could monitor growth of baby freshwater prawn
• reduce risk of natural predator
• to increase survival rates up to 90%
• high cost on start-up and electricity
• baby-sit the whole time

please comment if my findings was not accurate....