I used nothing but tapwater for over a year, when I lived back east. When I moved to Co. I got a white crust buildup after a few days, so I switched to distilled. Now that I have two chambers, I use tap water, and switch after two or three days, and clean the other chamber in the dishwasher.

I use 2 six foot hoses hooked together. The Machine sits on my bed side table, then the hose goes above my pillows, and is hooked to the middle of the headboard with a Velcro strap. Then it lays on the bed (under the covers) down between me and the wife, to about my waist, then bends back to my mask...

The ventilation holes on a full face mask are a safety issue. Without them, the user could recycle the same air over and over, like breathing in and out of a bag, inhaling air with increasingly depleted oxygen and elevated CO2. I couldn't fully understand the photo, but I would be worried about any...

Here is a pic of how I did mine. The green pad is not actually touching any of the holes, but difuses the air coming out.