As someone (bicyclist) who has used sugar based 'fluid replacement' drinks such as gatoraid etc. I sometimes find a 'green/black mold' growing in the 'water' bottle if it hasn't been washed clean. The mold grows quickly. I'd fill the bottle, add a teaspoon or less of bleach, shake it up and let it stand overnite. By morning the mold would be gone. Empty the bottle, rinse, refill and drink out of it that day. Did it for years, no problem.:dance
Perhaps this experience is one reason why I don't 'trust' the water supply in the
Casita for drinking. Especially since it sits stagnate for weeks at a time and you can't see what's in there. :o
Did you ever wonder where that 8" anode rod disappeared to?? ech!
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.......but the seals are happy, you can hear em 'bark' (some folks think it's air in the lines).:)