Water filter for drinking safe consumption?

I'm using a water filter for drinking which consist of a four stage catridge: activated carbon, silica sand, zeolite and mineral sand. Lately, I notice very small particles sentiment at the bottom of the mineral pot where the filtered water is stored. I believe this is from the filter catridge as there are large pores where the particles may pass through. Does this render the water unsafe for consumption?|||I think your suppose to run the water through it until all those particles are gone....|||Dont take chances replace the filter