Thin Bleach/Sodium Hypochlorite for Water Storage

[JWR]

I have purchased 20x 10 Litre containers for water storage. Various guidance suggests adding a few drops of 5-6% non thickened or fragranced bleach before storage. I can't find this actually in stock at any local shops, and online the postage makes it unnecessarily expensive for something that should be a few quid. Is there another option? Do I actually need to do this for water storage considering tap water is already treated with sodium hypochlorite?

[mbbaltic]

Baby bottle sterilizer. I think Milton actually give directions on how much to use

[jennyjj01]

I have purchased 20x 10 Litre containers for water storage. Various guidance suggests adding a few drops of 5-6% non thickened or fragranced bleach before storage. I can't find this actually in stock at any local shops, and online the postage makes it unnecessarily expensive for something that should be a few quid. Is there another option? Do I actually need to do this for water storage considering tap water is already treated with sodium hypochlorite?

Some preppers 'refresh' their tap water stores every six months or so.
Maybe use Milton or water purifying tablets. Shouldn't really be necessary.
https://www.amazon.co.uk/gp/product/B07PZYVWDH/
Store your water away from sunlight as algae is a risk.

[Frnc]

I don't add anything.

My process:
Wash with soapy water when new and rinse
Steralise with Milton tablets
Fill with tap water
Keep dark

Re-fill every 6 months to a year. Maybe re-steralise at this point.

[GillyBee]

Liquid bleach doesnt keep well - It will slowly turn into salt water. (Ask me how I know ) Baby sterilising tablets are now my go-to solution. The Asda ones give these instructions but others are much the same.

Water Purification: to destroy harmful bacteria found in contaminated water and protect against illness caused by waterborne diseases. Dissolve 1 tablet per 25L of drinking water (50L if low risk area). Leave for 10 minutes before drinking.

[Yorkshire Andy]

Asda 42p a bottle for 2l