Well... Pretty disappointing my first experience with Vortech MP40. As you have read here I finally bit the bullet and decided to buy a new MP40 and WXM Module. I received them last night and after getting all of the kids in bed started setting up. I was so pumped to see it in action (no pun intended). I followed the instructions to the "T" and got the pump mounted and running in the tank. It defaults to steady mode so I just played with the flow and was really impressed by the power and flow in my tank. The MP40 had replaced (2) Koralia pumps and was blowing them out of the water (again no pun intended). I decided to set it to Reef Crest mode and leave it there while I set up the WXM Module. I set the flow to about 50% and was facinated to see the pump in action. I decided to turn up the % and just watch what this thing could do. Well... As I turned the pump up past 70% it "Stalled". The light was blinking Green,Red,Green, Red. So I get online and read that this means it "Stalled" It says check the Wet Side first which I did and everything was perfect. It said run the Dry Side by itself so I did and got the same error. This led me to believe the Dry Side is the problem. Needless to say I spent the next 4 hours trying to get it to run. Nothing!!!! Of course customer service is only open Monday - Friday when I am at work. I am calling today. The only thing that will keep me from going nuts will be if they say "We'll overnight you a new one for Saturday morning delivery". We'll see!!!