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