Have had nothing but trouble with neptune Cor20's. seems like the power supply is designed to fail around 14-16 months. Have had 3 now do the same exact thing. Trying to decide if I should buy another Cor20 as a backup knowing my current pump is ready to take a dump or go with something else. I have a 200 gallon tank but need a pump with head pressure as the sump is right below the tank. I can still by 2 more Cor20's and still not have the $ invested if I had orginaly bought an Abyzz. But from what I understand Abyzz is one and done. Sicce maybe Vectra? I might even go back to Iwaki's. What are you guys running on your big tanks?