The reef gods have it in for me!

[Quinn]

So everything in my tank has been going dandy for the last six months. No livestock losses since a single cleaner shrimp died mysteriously in the summer, lots of frags looking very nice, skimmer producing nice coffee-coloured skimmate...

All of a sudden, I have a huge cyano outbreak. It is basically covering all of my sandbed whereever light touches. I have tried siphoning it out but that seems like a lost cause. My strawberry conch seemed to be doing a good job for the first two weeks but in the last few days it's become a thick red mat. Coupled with that, I am now seeing the green type as well. I finally cleaned off my fuge walls today and found that rather than being half caulerpa and half tube worms, it's almost entirely filled with tube worms with a few sprigs of caulerpa here and there. I have translucent sea squirts everywhere in my live rock. I mentioned that I had a flood the other day when I added nine new SPS frags, thanks to the epoxy I expect. The weird thing is, over the last two days, my skimmer has been producing a full two litres of skimmate a day, and it looks like weak tea, rather than the two litres of dark stuff I used to get every two weeks.

So the problems basically are:
-Cyano like crazy
-Skimmer going nuts

Possible factors:
-Too many nutrients
-Worms may have killed off the caulerpa in the sump
-I started feeding my tang romaine lettuce rather than nori, and quite a bit
-I feed three times a day, first and second time pellets and flakes, then mysis before bed
-TDS and other levels
-I am doing tests now and will post when I have the readings

Unlikely factors:
-Lighting
-I have dual 400w Ushios
-Flow
-Mag 12 and four MJ1200s for about 15x turnover

So I am thinking I will clean out the fuge and get rid of some of the worms, clean the skimmer (I did this right after the flood though), and feed a bit less (twice a day).

Any suggestions or comments? My tank specifications are at http://www.canreef.com/phpBB2/viewtopic.php?t=5489.