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Biosand Filter

20-liter capacity

1. Water should not be poured in without letup. Filtration works in four hours at the earliest after filling for the biolayers to perform to the maximum. The longer the filtration time, the better, but never longer than three hours or the water will be odorous.
2. Water should be obtained from a single source. Biolayers consume pathogens from filtered waters. If the source of water is changed, the biological layers

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