De-chlorinate water with vitamin C

Chlorine can be removed from water by adding vitamin C to it. This could be a way to facilitate filtering tap water with a slow sand water filter. The chlorine in tap water makes using a biological sand water filter nearly impossible because the chlorine in the water will inhibit the growth of the beneficial bacteria that make a slow sand filter work. If the vitamin c inactivates the chlorine, then the water could be filtered with a slow sand filter.