What is the best thing to put in a water deposit of 6000ltr to keep water fresh.water is used for washing up c

Question

keep water fresh.Water is used for washing up,showers,cleaning teeth and everthing that tap water is used for in the house.except for drinking.I live in Spain so it gets warm

Answer 1

Small amounts of bleach added to the water will work. Don't over treat it with too much. Add a little at a time until you find a good mix.

Answer 2

I think you need a water pump, to keep the water circulating.