I had the same problem setting mine up as well. I feel that I am pretty good with technical stuff and this was very confusing!! Then after all was up and running my pump would not turn on, or at least I thought it wasn't on but I had to move the blade a little bit while in the water to get it going. Even though I had a little bit of trouble with this start up, the whole system is awesome and I can't wait to get another pump for the other side of the tank. I have the M900 as well and it really is silent and does a great job in 50 gallon tank. They are very fast to react to any changes from the website as well. I do wish they had some sort of app though as it seems weird to have a web address to go to and sign in to make a quick change or turn off. I am still learning about them so I am sure there are many things I am missing.