Antioxidant, Alkaline, Antibacterial filter for post-treatment of water. Use the Bio+AAA filter at the final stage of the purification system and get microbes free pure & healthy drinking water. It helps a person from fast aging due to high pollution nowadays. 90% of the food we eat is Acidic which is not good for the Human Body. So this Alkaline Bio Filter Neutralizes the acid by its Alkaline output and gives good PH scale water.