white fuzzies floating at night??

Long time since I've asked for the reefs advice/ help... bbut I've got some weird lookin white fuzzies floating through my tank right now... they weren't visible during the day and when the moons first come on they weren't there... they appeard an hour after.... any thought ideads on this? Oh and my clownfish is snacking on them and the last feeding was 2 days ago so I'm pretty sure its not any of the frozenleftovers



New tank spec

40G display

Hydor 1500 head

Corallife skimmer

48"t5. Dual bulb

40+lbs LR

2 peppermints

2 mexican turbos, 2 tiger turbos and an astraea

1fighting conch

Bunch of hermits

1 false perc

1 blue damsel

Colony of green star polyps

Mushrooms

1 kenya tree

1/2" oolite sandbed