I have a whole house water filtration system with a water softener attached. From what I'm told I have a filter that never needs replaced. It looks like a big oxygen tank. It's not working right. My water used to be soft and now it's constantly hard. I don't see anywhere to change a filter. I can tell the water is not running through the softener as the salt I put in it a month ago is still there. It seems as though it is back washing since I hear it click on and see water going down the drain. It seems as though it's not going through the water softener. Any advice or help would be greatly appreciated. Also it is Well Water. Thank you, mikenice