I would like to purchase 2 Kohler Forte Multifunction shower heads to replace my current shower heads which are Price Phister. I read and was also told that this model from Kohler is good for use in areas with hard water. I've had one recommendation to purchase the shower arms as well for this product. Do you think it is necessary to purchase the Kholer shower arms(each arm costs about as much as the shower heads ) or can I use the ones I already have in place?
