im goin to go out on a limb here and say change your bulbs,not all at once. your sand bed might need a restart too,but with algea growth like this u wouldnt see phosphates you prob already know that.
Forgot to mention... changed the bulbs already, one a week, back in February... also reduced the lighting cycle so the corals wouldn't get shocked. Slowly brought it back to where it is now... 12 hours actinics and 7 hours all four.
And yes, I know that is why phosphates are showing 0, hence my "yeah right". :spin3:
Here is what I think is happening: I have a lot of current, and while I don't get "dust storms", my sand bed for sure shifts around a lot. Not to mention the pistol shrimp, dunno how much sand he really moves. I think because of the sand bed moving I might be getting lots of "mini-cycles". I say this because I have constant diatom blooms, which normally happens during new tank syndrome.
Next week I am on vacation and I think I am going to pull everything out, take out the sand, and put my cutting board in. I had the cutting board in when I started the tank, but didn't have the flow I have now, so I had a lot of detritus build up. I think now with all the flow I have in there (over 180x turnover, when the vortech cycles all the way up), I should be able to suspend the funk for the filters to get it out a lot better.