So, I tested 1ppm on a fresh batch of filtered water and am not satisfied
So I got my order today of 4 filters. Now, these things come with a cap... Since I only have 1 jug I am filling up a HDPE 5L bottle with this 1ppm "pre-filter" water. Then I will install a fresh filter and my plan is to screw the cap back on this, now "pre-filter" and keep it for when I need to make more pre-filtered water so that I can run it through the good filter to extend the life of the good filter.
Would my pre-filter with the cap screwed back on it, be ok if I left it upside down cap touching the surface, and it should still be fine if I need to install it again to top up my 5L bottle with more pre-filtered 1ppm+ water? I'd hate to have to buy 2 jugs, so I am more wanting to just pre-filter, swap filter and filter this stuff when I need more water, rather than keep running tap water through the fresh filter.
My main concern is, will the pre-filter being capped and left alone be ok to use weeks or months down the line?