Something on the same line when it comes to water storage.
I learned a long time ago with my motor homes that you don't filter the water going into the tank. I would filter it to take the "hose" taste away. basically filtering out the chlorine. Filtering that out allowed critters to grow in my tanks. To fix this, I stopped filtering into the tank then, I installed a solid carbon filter after my pump and would add a bit of bleach to the tank, if the water was going to be stored. The carbon took the chlorine out and all the other crap from the city water. One other thing, chlorine breaks down over time. Long term storage means you need to add some every once in a while.
I still do the same today, hose water, add bleach (chlorine) if its going to sit for a while and filter the drinking portion.