Sterilization of water tank

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There once was a recipe on the Clorox bottle for treating drinking water but the FDA made them take it off. The bottle also had a recipe for treating poison oak and poison ivy but it went the same way.

The recipes can be easily found on the internet the last time I checked.
 
We have lived aboard for 10 years. Our tanks are SS. We get water from dozens of places each year from Canada to the keys. We have never yet found a need to sterilize our water system. The water is usually from municipal sources which has chlorine in it. We do have a carbon filter just after the water pump.

Similar for us.
3 years aboard with plastic tanks (400 gallon x 2)
Multiple sources including rain.
Only filter is the s/s mesh before pump.
No sterilise or flush and no problems.
 
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