Oh good another early riser.

Going back to the micro bubbles in your display, have you resolved this yet? The only two times i've seen, or see, bubbles in my tank is when the water in the sump gets low enough that the pump creates a minor cyclone (?) or whatever it's called when the water circles around the inlet allowing air to be sucked down into the inlet of the pump itself. The other is I first set up and the return line (both flexible and rigid) had a minor leak in it... in the locktite section.

I work at fort sam, if you are near there I could swing by if you'd like. Not an expert but it may help to get another set of eyes on it.