Alumeter is a simple idea which I have seen my grandparents use for years before the new system of purifiers came in market.
Alum is aluminium sulphate also known as 'chuna' or 'fitkari' in India. This chemical has a negative charge which combines with impurities in water allowing them to settle down at the bottom due to gravitational pull. This method works perfectly not taking away the essential nutrients from water but requires some patience.
As I am jain by religion, I have also seen Jainism monks use it in their respective water filters which they carry around. The taste of the water they drink is even more pure than what we get in bisleri bottles.
Alumeter is using the same technology which can be handed to large parts of India, especially slums. We want to convert the simple buckets available in every household into a new water filter for them. This idea requires least amount of initial investment and gives a DIY facility to various households. India already has great amount of costly filter products available in markets, we want 'alumeter' to be india's first prepare, repair and fair toolkit filter.