Quote Originally Posted by Roham
Make sure to only use distilled water though to keep your sponge moist
Distilled water is recommended for fancy humidifiers like beads or Credo units because the minerals in non-distilled water will tend to ruin the unit. If you're using just a regular sponge, I don't think it hurts to use regular ole tap water until you for now. The urban legend that using tap water in a humidification unit will ruin the taste of your cigars is just than, an urban legend.

However when you do get a better humidification unit, it's best to use distilled water.