You really should use something like a biofilm eliminator for long term storage. You know that slime in the waterers? You need to prevent that. I use this. Most municipal water sources have already been treated with chlorine or a derivative., but that film still builds up.When you set aside water do you put chlorine bleach in it just when you use it, or when you first store it?
This will treat 330 gallons. Long term storage is best in the blue bottles intended for reuse if possible.

