Alrighty, take #2.
I filled various glass bottles and jars with filtered water after thoroughly washing them out, and stored them indoors in a dark place for about 4 months before I ended up needing to drink it. I hadn't added any bleach or purification chemicals, but I did add some Concentrace mineral drops
under the idea that mineralized water might be less likely to go bad than unmineralized water (I head it somewhere).Bad idea.
The water had no visible change, nothing growing in it or anything, but it smelled like rotten seaweed and tasted equally foul. Now, I add the mineral drops to my drinking water frequently and have never noticed any issue, yet when added in the same or less concentration and stored it creates this off smell and taste. Good to know.
A couple of the bottles don't have this in them, but they accidentally got placed with the others with no labeling to tell which is which. I know, terribly unscientific of me. I keep hoping with each bottle I open that it will be a "nice" one without the mineral addition.
I used my Steripen
to make it safe to drink and improvised my shower filter to run it through that and improved the taste. It's still not all the way gone, but I'm able to choke it down without ruining my appetite. I'll call it survival training.
(The alternative would be to go to the next location a week ahead of schedule or to purchase glass bottled water, which is ridiculously expensive. I'll take my preps instead, imperfect as they may be, thankyouverymuch!)
Next time around I'll be storing it again without the mineral addition; see if I can replicate the results of the first experiment while storing indoors, and using the Steripen as a final purification step so I can actually utilize the water with confidence.
In the end it may turn out more feasible to store water with bleach and then filter it out just prior to use than storing it without chemicals (even the ones in plain tap water) but I'd need to purchase yet more equipment to try that route so for now I'm continuing to experiment with what I've got.