I live in a 3rd world northeast african country and i desperately need something that filters my water. I have 2 water tanks, together they are 3000L, therefore people in my neighbourhood rely on my house for water at times. Id like to be able to filter all of it, but in my country we only have access to small water filters(for drinking).

http://m.imgur.com/a/awdSo

Is there anything i can buy/diy that can filter large amounts of water(atleast 100L in a few hours)?

Ps. I already asked diy and adv