You should definately have a second pump for your nitrous. I ran mine from a splitter at the tank, and wired it so that it came on when I supplied power to regulator switch. In otherwords, my system had a button for the juice, and a switch inline before that, so that I couldn't hit the button by accident. When the inline switch came on, it also supplied power to the aux. pump.
Take care,
-Chris
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