Here's a picture of where I stand now. Some things need moved, but that'll happen after I get the new light. I tossed in all my rubble from the filter I was running (filled a 4x12 media bag and then some) and I haven't seen any spikes.
This light is pretty sweet. In just a fee days, my birdsnest has turned from a whitish, washed-out green to bright and definitely green. I think it still has a little colouring up to do, but so far, so good. My zoas and palys seem to like it, as does my frogspawn. My hammer and gsp haven't been opening much so I think I need to find a better place for them.