I do it some what different and I think it works. I fill tank about 1/2 full. Then I put 1/4 cup of bleach per 15 gal. of water, I have a 40 gal tank so I use a little under 3/4 cup of bleach, I pour the bleach in my water hose then flush it into the water tank. I then run all the faucets then let it sit for 2-3 hours then run all the water through the system then refill the tank. I learned the hose trick on this site and it makes it very easy.
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