2 Pc Filter (1 Carbon Block & 1 Activated Alumina) Standard 10" Filter Cartridge
- 1 CARBON BLOCK WATER FILTER 5 Micron
- 1 FLUORIDE REDUCTION WATER FILTER (ACTIVATED ALUMINA)
Fluoride adsorbent, Arsenic & Lead Reduction.
Activated alumina is also widely used to remove fluoride from drinking water. In the US, there are widespread programs to fluoridate drinking water. Activated alumina filters can easily reduce fluoride levels from .5 ppm to less than .1 ppm. The amount of fluoride leached from the water being filtered depends on how long the water is actually touching the alumina filter media. Basically, the more alumina in the filter, the less fluoride will be in the final, filtered water. Lower temperature water, and lower pH water (acidic water) are filtered more effectively too.
Activated alumina is manufactured from aluminium hydroxide by dehydroxylating it in a way that produces a highly porous material; this material can have a surface area significantly over 200 square metres/g. The compound is used as a desiccant (to keep things dry by absorbing water from the air) and as a filter of fluoride, arsenic and selenium in drinking water. It is made of aluminium oxide (alumina; Al2O3), the same chemical substance as sapphire and ruby (but without the impurities that give those gems their color). It has a very high surface-area-to-weight ratio, due to the many "tunnel like" pores that it has.
This replacement filter sets fits our standard 10" RO,Under Sink,Counter Top Water Filter Housings.(Dual) 10" x 2.75"