The water isnt sterilized by the hospital, its bought from a manufacturer.
Who knows what type of sterilization they use. ETO gas is commonly used to sterilize sensitive OR equipment, but Im not sure about water..... because the Or itself doesnt sterilize it!
Sterilization is not the same as purified.
You are stealing if you are taking this, and as stated above, you would need a generous amount to make a water change.
the largest Ive seen is a 1000ml bottle, which isnt much in terms of a tank.
Good thinking, but BAD idea IMO.
-Jess
Scrub Tech S. Florida