You'll be fine for a week of storage covered and unlit.wash the bottles once in a while with a gallon of ro an couple drops of bleach,give it a good swish around and rinse with another gallon of clean ro water.let the bottle dry upside down on a piece of paper towel for a day before using it.
Thanks for the heads up I just plan on storing 15 gallon of water per week so that I always have water on hand.
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You wouldn't want to see my tank. I don't use fancy equipment and I am a noob