Did you actually buy a Powerline Conditioner with wireless extender? It's kind of like the old x10 modules where it uses your homes power wires as a communication bus.This is what I have been using. If you start having weird issues check your ground all the way back to the earth. I found someone disconnected ours outside before we moved in so I had to drive new rods. Cleared up my issue.
For reliable service both ends of the powerline adapter need to be plugged directly to the wall and not through a battery back up or power strip. At least this is the way it is supposed to be done. I can't say how it works for real but it makes sense in my head.
If you run a battery back up on your tank you will want a wireless gaming adapter still in order to receive emails in the event that you lose power at your house.
I will be switching to a wireless adapter soon.