Water "hardness" ie the amount of minerals dissolved in the water if I'm not mistaken. I've got a modded out soda-stream that uses large paint-ball CO2 tanks an

Water "hardness" ie the amount of minerals dissolved in the water if I'm not mistaken. I've got a modded out soda-stream that uses large paint-ball CO2 tanks and I've tried lots of different things. Water run through a "softener" is very different than not and distilled is much more different than both of those.