but "the water" and "water" mean different things here, and the same holds for the German "das Wasser" and "Wasser".
"I like water" means that you generally like the substance water, while "I like the water" is only saying that you don't like that specific water that has been referenced before, e.g. that is standing on the table now.
Those are two different sentences. If you leave out the article the sentence gets a different meaning.