I wouldn't either. I think you found your problem a lot quicker then I found mine. I had no idea for weeks why everything was closing up. Also, that frogspawn coral I have looked completely dead at one point, but I left it in just in case. I could barely see the smallest amount of tissue way down in the skeleton. Now, it's one happy thriving coral. That one took a while but it just shows how bad it can get and still be saved.
I didnt find it very quickly at all, it was months of chasing, possibly 5-6 months.
I was going down the wrong path, multiple wrong paths as well. I first thought lighting, so kept changing the settings on my light, I thought the paling was from too much, then not enough.
Then all the corals didnt open as much. I kept doing water changes thinking that it was something I couldn't test for, so I ran carbon and poly filter to check for any metals in the water, as that changes colour if something is removed by it. I checked all my equipment, which doesn't consist of much. I only have a return pump, a small flow pump, a wave maker and a heater and they were all fine.
I tried stray voltage and nothing. I just Couldn't put my finger on it, it was almost to the point I was going to just give up, I was losing love for the mini reef I had grown from frags, and It didn't seem to be getting any better no matter what I did. The glass was filthy within a day and I just got fed up cleaning it to the state I could hardly see through it, normally 4 days later.
The only thing that has helped, was having sleepless nights, while not sleeping I was reading endless posts here on R2R!
You pick up clues and other avenues to try, from posts here and there. Others have had similar sounding issues, not normally the exact same issues or not worded the same, so a search doesn't bring it up, as is normally the case.
You then find a solution from all the clues you have gathered, all of a sudden people have had or have got the exact same issues, that you've spent months trying to find.
So now I'm hoping that my tanks I'm having issues with make a good recovery, I know it's not going to be an over night fix and I'm still going to have to work at it. I think I'm now finally on the right road. It was all down to this fabulous platform and the knowledge of reefers on here.