I have a chiller that has its own temp controller. I have pluged the pump for the water to the chiller into the temp controller so the pump only comes on when the chiller comes on. Everything works great but the chiller might not come on for several days at a time and when it does the water smells that comes out of the line. Is it bad to have the water sit in the lines for days and not moved around. Smells like my skimmer real bad.