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Welcome to Manit Farm

In 1970s, Manit Farm was originally established by Mr. Manit and Mrs. Wipa Leungnarumitchai. Initially it was set as a catfish farm in Tumbon Sala Ya, Phutthamonthon district, Nakhon Pathom province, but the farm later expanded and finally moved its location to Khao Yoi and Ban Laem district in Petchaburi province, which is the current location of Manit Farm.

Farm Facilities
Tilapia Genetics Center

Tilapia Genetics Center was established in 2007 by the collaboration of Manit Farm and Akvaforsk Genetics Center from Norway, with over 30 years of its expertise in aquatic animal breeding and selection. We harmonize our own 20-year experience in Tilapia farming with the experience in aquatic animal breeding and selection and the latest technology of the scientists from Akvaforsk Genetics Center to develop and fine-tune our Tilapia and Red Tilapia strain.

At Manit Farm, we truly believe that good strain equals profitability of the farmer. Therefore, we have put together our efforts to do research and seek for a certain attribute that meets the need of our farmers in various conditions, and set it as our work target in our comprehensive genetics development program. The result showed that the prominent attributes of Tilapia that our customers need are; resistance to disease, fast growth, small head, thick ridge, and overall meaty.

Then our mission commenced by the collection of over 6 strains of Tilapia and Red Tilapia, each of which possessed the prominent genetic quality in one way or another, from Thailand and overseas countries to use for the selection by Family Selection principle; selecting dominant attribute from each generation of the parent brood fish, using microchip identification for back tracing and accurate analysis. With the dominant genetic attributes collected and passed on through generations.

Eventually, we achieved the first generation of SuperBlack Nile Tilapia and SuperRed Red Tilapia in 2009. Both SuperBlack and Super Red are robust, disease resistant, good appetite, good growth in diversified condition in either fresh or brackish water, either in earthen pond or fish cage. The fish grow fast and allow a shorter rearing period, resulting in a very satisfying crop management and obviously more profitability.

Brood Fish

Quality fry comes from quality brood fish. The good care of brood fish is then considered essential to obtain quality fry. Therefore, we provide special care for the conditions and management in the brood fish section. At Manit Farm, the brood fish are reared in cement tanks in a controlled environment, including water quality control to maintain the optimal condition for breeding. The water circulation system of brood fish section is totally isolated in order to reduce the risk of contamination. With our own Tilapia Genetics Center, we are able to plan and carry on the breeding program precisely in each generation. Moreover, we are able to have fertile brood fish continuously for a consistent breeding program. Note that each generation of brood fish serves only not over 18 months at average.


The hatching rate (the development from egg to fry) depends tremendously on the hatchery management. The key element is the water quality control to maintain biological balance at all times. At Manit Farm, the hatchery is a closed system with water pre-treatment system taking water from our farm’s reservoir into the hatchery’s conditioning tank before having a particular pre-treatment using our Re-circulating Aquaculture System to ensure all biological and chemical parameters including ammonia, nitrite, alkaline, hardness, and dissolved oxygen are in the optimal range for hatching. Micro-organism is used to control water quality, and chemicals are not used at any step.

Not only focuses on the significance of water quality control, Manit Farm also cuts down the risk of disease occurrence by consistent laboratory testing to monitor any bacterial or parasitic contamination in the egg hatching water, enabling a timely problem tackling, if a test result occurs positive.

Feed Preparation Room

Each step of fry production is a delicate work. Feed preparation is one of those steps Manit Farm pays a lot of attention to. We prepare optimized pellet size and feed formula for different stages in order for the fry to get the best feed at an optimal quantity. To enhance the health of the fry, we use pro-biotic and vitamins as feed additives to ensure the fish immunity as a preventive measure rather than using chemical as a cure. Every piece of equipment used in feed preparation process is cleaned prior to each usage, to ensure the best accurate formula, the best feed and the cleanest feed for each stage of fry.

Fry nursery

Manit Farm is located in a brackish water area, with salinity at 5 ppt, so its location is an advantage for fry nursing where the health of fry can be enhanced without using antibiotic since the salinity reduces infection rate. However, we still have disease management and control program in a regular basis.

Fry nursery section sends random sample of fry to the laboratory for testing every 13 days to monitor parasite, Trichodina, Gyrodactylus, or Dactylogyrus infestation, and to change the net cages to newly cleaned ones for better water flow, maintaining optimal dissolved oxygen level. Feeding is done 5 times a day to ensure that the sex-reversal process takes complete effect.

Conditioning before sale

When the fry reaches a certain stage for sale, it is transferred from the nursery into the cement tank for grading. At Manit Farm, we use automatic fry size grading machine to remain the best condition of fry yet they are correctly separated by size. The machine separates fry of each size into a conditioning tank with optimal dissolved oxygen. The fry stays in conditioning tank; free of feeding (fasting) for 12-24 hours to be ready for packing and transportation.

For packing, we use automatic packing machine for a fast and firm packing, and also to minimize the bruise from manual packing. Once packed, it is transported to the farm of customer.

Each batch of fry sale is subject to a designated code for back-tracing and the farm also randomly samples some fry from a particular batch for rearing and monitoring its growth rate.


Manit Farm has its own standardized laboratory that can perform soil and water quality testing, external parasite check, bacteria count, Haematocrit analysis, and the sex reversal percentage check in a very efficient manner. It also performs chemical testing and collects data for the research and development work to attain the best and most efficient farming practice. The duty and responsibility of the laboratory is to monitor and prevent the fry production from diseases prior to its actual occurrence, and also to help solve any problems taking place on the farm. It is considered a vital supporting unit to other sections in terms of analysis of indicators affecting water quality and fish health.