Caulerpa Crashed-Observations

[wizardgus®]

Well, I guess I earned another reefer merit badge...my Caulerpa crashed last night. I was very lucky, I caught it within 10-15 minutes tops. Water is crystal clear this morning, fish are looking better as well as the inverts, corals, Tunicates and sponges. Interesting that the worst affected was the sponges and my Kole tang.

What I did:
Like I said we caught it within 15 minutes tops, but the display tank was already milky looking, fish were very stressed, all polyps were tightly contracted, sponge looked deflated. I immediately took the fuge off-line. Then I set the wavemaker to rough seas program for aeration. I did a 5g. water change and started RO/DI unit (Happily my unit makes 4g./hr.) I put fresh carbon in power filter and got that running. Made another 5 g. SW, put 2 150W heaters and big airstone in the bucket, got it up to 80 degrees in 2 hours. Then did same with a 3rd. 5g. Long night!

Observations:
This is the main reason for my post, to add what I can to our scanty knowledge base on this subject. Especially since much of it is at odds with what I've read here.
1. You can keep Caulerpa from crashing by dosing Iron...Nope, I dose.
2. You can avoid crash with extended lighting schedule...Nope, I have 18 hour photo period on my fuge.
3. Regular harvesting will avoid crashing...Nope, I just harvested less than a month ago, fuge was barely 1/2 full.
4. Racemosa is most prone to crashing...Not this time. I have Racemosa, Prolifera, and Mexicana in my fuge. The mexicana is what crashed, some prolifera, didn't see any bad Racemosa.
5. You have time to see it turning....Definitely not. I spend a lot of time looking at my fuge. I saw a few white pieces in the morning (which I removed) crash happened at 5:30PM.

My hope is to tease what I can learn out of this, so any observations, questions, or experiences would be much appreciated. Thanks.