Okay I see, thanks for the info . Also I have another issue . I own one of the bubble blaster 1000 skimmer pumps . It is in the cone style hob skimmer I bought a few years ago. I think the xp-1000. It works great but it is starting to loose prime more and more often . The water level drops and if have to pinch the Venturi hose for a second and the level with rise and stay there for a day or so . Seems like it is loosing prime ? Do I need new o-rings? If so is there an O-ring kit for it ?