Hi all. I've installed a 7000SXT water softener system from isopurewater. It's a 2 cubic unit. At first the unit was working fine. Ever since I've installed this unit I noticed on the 15 day I don't' have soft water. Now the soft water is gone in a matter of days. I just installed this unit a few months ago so it's really new. The settings are all factory except the hardness level which is set at 15 and the grain level which is set at 64000 grain. Is there anything I need to look out for? Thanks in advance.