Man drinks swamp water after filtering it through his home made sand-charcoal filter.
Now this stone - sand - charcoal filter was commonly seen in the 70s in BD when I was young. Extra added was a lime layer.
Now its all commercial filters.
Now this stone - sand - charcoal filter was commonly seen in the 70s in BD when I was young. Extra added was a lime layer.
Now its all commercial filters.