I orders a new emperor 400 from big als.. the first one came absolutely useless nothing happened at all when i plugged it in i took it apart put it back together nothing. Now i just received the replacement to that one and the spray bars that drive the bio wheels aren't working I'm going to get sick of this real fast. I'm calling marineland tomorrow to see what they can do for me i guess, unless anyone on here has any ideas as to why the spray bars wouldn't be going?