Reefkeeping is like golf, to me. It's not the 40 - 50 bad shots that I make, it's the one really good one that makes me go back again. I have struggled with this or that on my tank for several years. But every now and then, I'll have something that goes right and I want more of that so I keep at it.
A local guy just traded out a 125 for a 120, in the process of switching everything over he nuked about 95% of his livestock. I think he lost every fish and most of his corals. His tank, now, looks like poop, but he understands that it is a transitioning phase that he will soon be through.
Another local guy here (was TOTM before) went through over a year where he lost several thousand $$$ in corals alone.
Basically, what I am saying is that reefkeeping is a perpetual project. You are dealing with an ever changing environment. There are some days that you look at your tank and say "Yes, it finally looks good", but IMO, then it is time to get ready, because something bad is gonna happen.