Is it too late to order a different pump? That one is too big for your pool. In the case of pool pumps, bigger is not better. If your pump is too big it simply forces debris through the media and back into the pool without really filtering the water very well.

You want to get rid of the Nature 2 unit. It adds copper to your pool. Contrary to popular belief, it is copper that stains things and turns blonde hair green and not chlorine.

What are the ingredients in the shock?