My hypothesis was proven incorrect and correct at the same time. I estimated that Distilled would be healthier, but H2Go proved that guess wrong. I was correct in the sense that I thought tap would be the worst.
I found this really interesting, because automatically people think that distilled would be healthier, but in actual fact the brand H2Go was healthier by far. In fact, distilled was one of the worse ones.
What was astounding was that our tap water was actually quite bad! Everyone goes to the tap and drinks the fresh water. This also shows that having a filter will make your water a lot healthier. According to my observations, having a filter will not only make it healthier, but it will also take out excess chlorine in your water.