Black matter floating in water is a coal that is safe for health and can escape from the filter during pre-filtering. It includes soaking the filter in water for 15 minutes, then placing it in a jug and filtering the water 3 times, during this process pollutants may come out from the filter.
During pre-filtration, the components of the mixture are activated, following the instructions prevents the release of contaminants along with purified water.
- 13 marca, 2018
