overflow
I have two, they are clones of the cpr overflows, i cant really tell the difference between these and the cpr's. one is rated at 600gph the other 1200gph. The 600gph is new never used, the 1200 is used, both are Continuous Siphon and should be used with aqualifters. the 1200 has been damaged (the acrylic nipple on top was broken off), nothing jb weld cant fix i would imagine. still works though with silicone sealant. I would let the 600 gph model go for 30 bucks(less than i paid and its still new.) I would throw in the 1200 gph model in for another 20 bucks.