April 7: 1 month and
two weeks later to make the bottles.
Become to compare bottles and found that:
Which was in darkness: the water surface is cloudy, the body
of the bottle is increasingly black spots by precipitation of calcium sulfate
and blackspot fund has increased sulfate concentration (yellow bottle cap).
Instead it was in the light, surface water is clear, the
body of the bottle does not have black spots but an increase of orange areas by
anaerobic bacteria. The fund is exactly like the bottle of darkness (blue
bottle cap).
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