1800 gallons of water treating capacity isn't enough?
Hmmm...that brings up an interesting question, just how long/how well should a kit like this work? Seems to me that if you haven't found a source of potable water after you've hit the 1800 gallon mark, you've got issues to deal with that virtually no "survival box" is gonna fix.
John E
_________________________
JohnE
"and all the lousy little poets
comin round
tryin' to sound like Charlie Manson"
The Future/Leonard Cohen