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How to Culture Greenwater

Method 1 Method 1 of 2: Simpler, slower method
  1. 1 Put aged aquarium water in a clear container.
  2. 2 Expose the water to the sun. Doing this takes quite a long time for the algae to bloom. See the next method for something faster.
Method 2 Method 2 of 2: Faster method
  1. 1 Pluck 10 smoothly surfaced and thin leaves.
  2. 2 Wash and rinse the leaves until they are clean. Don't use soap!
  3. 3 Put the leaves in the blender with water. You can also add fish micro pellets to help the culture bloom more quickly.
  4. 4 Blend the water with the leaves. Do this for about 1 minute.
  5. 5 Sieve any blended leaves and put the water in a bottle.
  6. 6 Put the bottle under a bright light overnight so that the phytoplankton will bloom.
  7. 7 Fill a bucket with water.
  8. 8 Put the greenwater that has been sitting under a bright light overnight in the bucket.
  9. 9 Let the bucket sit under the sun. In about a few days, the phytoplankton will grow.