We recently added a water softener system large enough to soften the entire plant water supply to include the towers. We are softening the water supply to between 0 and 1 grains (0 – 17 ppm) harness. My concern is how is this going to affect my condensing towers? They are all older galvanized towers, the newest one being 15 years old.

I am ready articles about how it can destroy the tower, and I am also seeing articles that say you can run soft water just not below around 2 grains (35 ppm).

What are your thoughts on this?