To keep water fresh in a storage tank you can treat each gallon of water by adding 4 to 5 drops of bleach. It's important to choose a bleach brand that contains 4% to 6% sodium hypochlorite, such as Clorox or Purex. For larger quantities, a teaspoon of bleach can disinfect approximately 5 gallons of water. This disinfection process helps eliminate potential contaminants and ensures that the stored water remains suitable for consumption over an extended period.
I have seven 5 gallon water jugs that I use to top off my saltwater fish tank. For the last couple years they have been taking up a log of floor space in my garage. As you've seen on a few of my past projects like the DIY Reclaimed Pallet Shelf or the Wood Storage Cart , I am trying to reclaim so