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Chaetoceros gracilis. A marine centric diatom. Used in shrimp and mollusk mariculture as a food source. Each unialgal culture contains enough material for a class of 30 students. This culture requires a high light level of 200 to 400-foot candles of fluorescent light 18 to 24" from the culture. Optimal medium: Erdschreiber's. Optimum growth temperature: 22° C.
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