O/T Well question

First, if you have a water softener, switch it to bypass. Bleach isn't good for the resin bed.

Dump about a gallon of bleach down the well. Then take your garden hose, and run water down the well until you smell a strong bleach scent. Run water down the well for awhile, trying to wash all the inside pipe surface. Be careful not to electrocute yourself by shorting out the pump wires.

After you've circulated the well, turn on all the taps in the house until you smell bleach coming out all of them. It will take quite a bit to treat the hot water, so you might as well turn off the water heater.

Once you smell bleach at each faucet, leave for the day. (If you can't smell the bleach, you didn't use enough.) Come back eight hours later and start running your garden hose until the bleach smell is gone. Then start flushing out the inside taps. Note that this may kick loose a lot of rust; take the screens out of the faucets so they don't plug up. Once the bleach smell is mostly gone you should be all set.