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Soil having little or no organic content is substituted for garden-type soil; lacks supplements; for some strains of Closterium, freshwater dinoflagellates and others.
For 200 mL Total
1. Combine components.
2. Cover the medium container and steam for 2 consecutive days, 3 hours on each day.
3. Refrigerate 24 hours or more and bring to room temperature before use.
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