So after repeatedly getting bad water from my LFS's I'm looking at getting myself a 4 stage BRS RO/DI setup to make my own water. I have a water volume between tank and sump of 50 gallons and I'd like to keep about 15 gallons stored for water changes and my ATO. I live in an apartment so I unfortunately can't get any large container for lack of a place to put one. But I have been looking at getting 2 or 3 of the blue 5 gallon jugs used for a water cooler. I was looking at Walmart and they have two options, one being considerably more expensive than the other. I see that the more expensive one says it's made from 100% food safe polycarbonate plastic and the other one only states BPA free. Am I going to run into issues storing my water in the cheaper jugs as opposed to the more expensive ones? The water will be stored indoors out of any direct sunlight and will only be RO/DI not mixed saltwater. Thank you in advance!