The flowthrough water replacement system is a water management system for white shrimp (Litopenaeus vannamei) cultivation with water replacement of up to 30% per day when the DOC is above 30 days. The aim of this method is to ensure the quality of shrimp cultivation water in an effort to improve shrimp growth and health.
A shrimp pond unit in Buer District, Sumbawa Regency, West Nusa Tenggara has been built, consisting of 6 square cultivation ponds, (@ 1,225 m2) 2 reservoir ponds (@ 1,400 m2), 1 settling pond and Waste Water Treatment Pond unit. The flow of cultivation activities includes: pond preparation (pond cleaning, checking HDPE plastic, installing 6 paddle wheels, installing biosecurity fences), water preparation, application of probiotics: Lactobacillus sp.), Stocking density of fry 250 PL/m2, Shrimp feeding using automatic feeder with Index value:
0.5 – 0.75 and Water exchanges up to 30%). Observation parameters: Average Daily Growth (ADG), Survival Rate (SR), and Feed Conversion Ratio (FCR)
The results of the activity show that the ADG value ranges from 0.35 – 0.58 (Sampling DOC 30
– DOC 80). The average weight of DOC 80 is 25.72 grams; Size 38; SR 78.36%; FCR 1.58. At the end of cultivation (DOC 104) an average weight of 37.04 grams was obtained with size 27 . The total harvest obtained was 33,335 tons and FCR 1.25. The production cost per kg of shrimp is Rp. 33,300.
The implementation of the flowthrough water replacement system in water quality management has had a significant impact on increasing the white shrimp vannamei production in Sumbawa Regency.