Confusion very likely is on my part. Reading through the forum (and on Amazon) saw several references to using 3oz of bleach instead of commercial additives for maintaining potability. Knowing water would be in tank for several days prior to use, was planning to be safe (and cheap). At this point, figure we'll use bottled water for everything but flushing on our one boondock night down to the Keys, then flush and refill on arrival. Still confused on the gray water indicator though. Will get that one figured out on site as well, I guess.
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