“Ummm… what does that even mean?” he asked, a sharp edge creeping under the confusion.

The internal tank. “I… think so,” he admitted, annoyed and suddenly unsure. “I’d just filled the five-gallon jug and the gallon inside the unit.” “Well, if there’s still water in the H2ONU and the nanos are still producing hydrogen…And Tian is about to take the hydrogenproducing device into a diesel-powered submarine…” His voice dropped. “We could have a pretty big problem.” Ray squinted at him, trying to make the math work. “Ummm… what does that even mean?” he asked, a sharp edge creeping under the confusion.