174 - Basic alchemy

"…mustn’t drink purified water directly,” the teacher said.

“Wait a second. Why? Isn’t it clean already? You said it yourself, it’s purified,” Mugen asked.

“Yeah my uncle ever said the same thing, but I never asked why,” Ugi added. “Is it still dirty somehow even though it looks clean enough for us to drink?”

“That question is almost correct. You see, it’s because of the substance within it. Notice when I said purified water and not pure water. Pure water came from the water source which was already filtered by the mountain. The water underwent a natural filtering process and ended up becoming a river, or a waterfall. But purified water is the dirty water that we purified using purifier. That is not filtered naturally. It’s purified by adding something else. That is not healthy for us because there is an added essence inside it,” the teacher answered and explained slowly.

“But how do you know the water you drink is pure or purified? They’re both cryst