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Green Water Culture

$10.00 / Sold Out


8oz Green Water Culture for Sale

Green Water is composed of phytoplankton which is a valuable source of food for fish larvae and fry. Phytoplankton is also used to feed Daphnia magna, Brine Shrimp, and Gammarus Shrimp, and rotifer cultures as well. In fact, extensive use of phytoplankton can be observed in various fields of aquaculture. The reason for the wide application of phytoplankton is due to the fact that they compose the base food chain in nature. In aquaculture, the technique of rearing fish larvae with phytoplankton green water culture is called “green water technique.” The “green water technique” is used in hatcheries due to various benefits which include:

  • Provide a direct food source for fish larvae and fry
  • Provide an indirect food source for fish larvae and fry by maintaining nutritional value of live prey organisms
  • Stablilization of water quality through removal of metabolic waste and produce oxygen
  • Stimulate non-specific immune system of fish larvae and fry by providing polysaccharides found in algal cell walls
  • Enhancing the visual contrast through light dispersion for fish larvae and fry with developing perception organs
  • Microbial control

Culturing Green Water
Culturing green water naturally is possible with a basic setup. Provide the culture with aeration, nutrients, and light. First, add distilled water into a sterile cotainer. Provide aeration with an air pump or a large water surface area. Add ¼ of a boiled lettuce to provide the nutrient necessary for ammonia production. Controlled amounts of pure ammonia can be added as a substitute as well. A strong light source such as sunlight must be provided as well for phytoplankton growth. Maintain a temperature range of 20~24°C, pH 7.5-8.5. Allow the phytoplankton to grow until the water turns green. This process takes approximately two weeks to start. Since this not a controlled method, it can produce a variety of phytoplankton and bacteria as well.