Unusual increase in Suspended Particulate in SPS TANK (Think I found reason).
That Turbo Snail in Alage Scrubber is munch, and is ripping apart some of the macro he passed over. (The Macro Stuff is very flacky / brittle)
Might put a better ATS-OUTPUT Filter/Screen in place. Or use brine-shrimp-Net just to scoop-clean ATS.
Or let it be. Could be particulate food for Corals? Fish?