Why is SweetWater Purifier Solution added after filtration?

When developing the system, both pre- and post-treatment methods were tested. We found that post-treatment was the simplest, the most effective, and the best way to minimize the amount of chemical used in the water. This is because filtration removes a majority of the contaminants from the water, which allows the chlorine to react only with the viruses.

Therefore, much less chlorine is needed and you don't have to have to worry about water conditions.

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