I’ve come across a lot of analogies when talking about water for tea. A memorable one is: tea is the music, water is the speakers. Thats pretty close to how it is, but maybe tea is the music and water is the orchestra playing it. Both of these analogies involve the reproduction of music, but with the orchestra analogy there’s more responsibility given to the water. Furthermore, the orchestra would have a conductor, which would be the human brewer. But then, is the teapot the first chair, the best player in the orchestra? Or would that be the dominant flavor? No, the dominant flavor is part of the musical composition. Then, the cup must be the acoustics. But isn’t the acoustics the actual space that the tea drinking is happening in? The teapot might be the instruments that the orchestra is playing. So the water is playing the teapot, which is playing the tea into the cup; all led by the brewer.
I’ve gotten feedback on discord from people who tried a different water and were struck by how big of a difference it made, more than teaware, brewing temperature, ratio, or any other parameter. Water can be heavy, light, vibrant, muddled, astringent, subdued, dense, spacious, fluffy, metallic, smooth, and more. Water can, by the way it extracts, cause tea to be any of these things. You can even have a smooth water that makes astringent tea, so there can be a mismatch. That’s like how a shy violin player can play quite loudly and with great presence on stage.
The point is, there are many different kinds of water, and different levels. You wouldn’t yell at a 6th grade orchestra for not sounding like the Vienna symphony. So, either you have to accept your water as it is, with its flaws, or you have to figure out something better. I’ve found that there’s not much you can add or change with a bad water to make it better, just like there’s not much you can do with a not-so-talented orchestra to make it world-class. For the orchestra, you basically have to kick out all but the best players, and then replace them with better ones. With water, it’s similar. By diluting the water, you make room to introduce a better group and balance of minerals. Since every water is different and mineral content reports are so spotty and often incomplete, it’s hard to know what to add to the diluted water. So, it’s often easier to simply throw out the old water and get a new one.
With the modern recycling crisis and the expense of water transport, coupled with the non-availability of good water in glass bottles for any reasonable price, and the difficulty of making 0ppm TDS water to make recipes with (home Reverse Osmosis filters make 10ppm usually, depending on starting TDS, and distillers don’t make good tasting water, at least that I’ve tried) we as tea drinkers have to get lucky with our tap, or make do with a difficult and imperfect solution for the time being.