Unfortunately that is the same enviroment Legionella likes to grow in. Iron rich warm water. I'd super chlorinate with 12 cups of household bleach in a 40 gallon tank. Let that set for 12 hours then flush it through the taps. The heater has to be off for that. You have to blow off the sediment first.
Last edited by Armednfree; 07/23/19.
