So I have this 120 gal tank that I setup, let cycle with live rock, all parameters were in check and stable so I finally started to stock my tank, first with sps and lps then a few fish. Everything was going great for 2 or 3 weeks then I decided to swap out my sump for a new one I built and put 20 lbs live sand a 3lb live rock and chaeto. I think my tank is starting to cycle there are large air bubbles in a lot of places and the hardiest coral I have a Duncan that grew 4 heads in as many months closed up for the past 3 days and an acropora lost all it's purple color. Help!