D
Dotty
I don't understand croppie, can you explain, what is not water treatment ?
The only time I've seen treatment for the prevention of legionella is in water towers, the amount of chlorine used would make the use of the water for bathing unviable.
We both know that the cheapest and easiest way of combatting legionella is in a properly designed and maintained system that has a storage setpoint not below 60°c.
Though I'm starting to think the op is on a wind up here.