I am thinking about buying a xspc raystorm 750 ex240 or a xspc raystorm 750 ex120 liquid cooling kit . I seen a video on you tube on how to install the xspc raystorm 750 series and it looks pretty easy . but I want to know is there any maintenance you have to do on these custom coolers once installed ? and how often do you have to do it ? or is it just like a corsair closed water loop that once it is installed you don't have to do any thing to it ?