If you drink the filtered water straight, you will taste a fresh, so that you do not know and the finish is pleasantly soft.
I also made a Teetest and the same type of tea tastes completely different. The tea (summer fruit) with the gifilterten water tasted really soft, nice fruity and "round". The unfiltered with the water just tasted this to metalisch and chalky. The next day I tried both teas from yesterday again and gefiltertete tea still tastes very good, but the unfiltered to the water tasted just nor bad. So much better taste for so little money. Top!