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Production is consistent. Annual production exceed 12 tons/hectare/pond.	Production is not consistent and sometimes fails on production due to outbreaks of disease or low water and soil pH.

High Quality Product
Prawns have good texture healthy color and less "Blue-ness".	Some prawns have tail rot, shell disease, papery in texture and more "Blue ness".
Pond Fallow Period
Annual rainfall in coastal regions of Malaysia often exceeds 1600mm. And with monthly average of 130mm. HDPE Liner ponds, can be washed and cleaned in any weather. The disinfected ponds immediately can be restocked without "Sun-drying"	Washing and cleaning of earthen ponds normally are hindered by wet and moist days. "Sun-drying" is not possible in monsoon period. Fallow period is always extended and restocking is affected.
Accumulation of Sediment
Less hydrogen sulfide layer forms at pond bottom. Bottom clean, as sediment is discharged out during water exchange, less anaerobic toxic bacteria accumulate at pond bottom. Balanced ecosystem is conductive for healthy growth and is "Environmental-friendly".	More hydrogen sulfide layer is formed at pond bottom enhanced with more anaerobic toxic bacteria. Black bottom layer affects pond ecosystem and the results slow growth for prawns. The accumulated sediment causes pollution to coastal sea.
Contamination of sulfuric Acid and Soluble Iron
HDPE Liner pond prevents acid sulfate soil from contamination of pond water. Pond water pH always is in optimum range.	Seepage of sulfuric acid and soluble iron contaminate the pond water. Low pH and high iron results "stress" to prawns. Slow growth with "yellow gill" during raining season is very common in acid-sulfate mangrove soil.
Water Plankton Bloom
Culture of plankton can be easily maintained as not no contamination of sulfuric acid and toxic elements from the soil.	Bloom of "useful" plankton is succeeded by Oscillatoria-a "blue-green algae". Healthy growth is affected.
Pond Embankment
HDPE Liner prevent soil erosion on soil embankment from pond wave action. Embankment is solid and strong and maintenance cost is low.	Embankment of earthen pond subject to pond wave action that causes erosion on the embankment and the maintenance cost is higher.
Investment Risks
Disease free and production consistent. Investment risk is lesser.	High investment risk due to unforeseen problems of disease outbreaks. Investment return is lower.
Low Production Cost
Less application of medicine, lime and other drugs. Good FCR, production cost is lesser than that of earthen pond.	Use more lime, medicine, PSB, enzymes and other additives. FCR and production cost is higher.
Compound Upkeep
HDPE Liner ponds prevent growth of brushes and grasses. Animal predators and upkeep cost are lesser.	Growth of brushes is an anchorage for predators, such as reptiles and otters. Upkeep cost is higher.
HDPE Liner pond is very suitable for prevention of white-spot virus infection in a close system operation in which water exchange is minimized. Spread of white spot virus by crabs can be prevented as the smooth surface of the liner is too slippery to enable the crabs to climb up the pond.