I have well water. I had a very expensive water softener prior to this purchase and never had any issues. Since I have owned this new one, my overall water quality has gone down. Occasionally, I have dark water come out of the bathroom tub. Is there a backflush on this model? I NEVER had this problem prior to switching water softeners. Also, my plumber who has been busy in business for 28 years warned me against buying this product. He insisted it would not meet my needs with well water and he was RIGHT!