Question....I have two small colonies of green star polyps...started off as one rock, but it was cracked in half so I split it and put one on either end of the tank. I occasionally see something like a spider web filament coming out of the polyps from somewhere in there. Also, I have some gray looking stuff(for lack of a better word) in various spots on my sand, and some has ended up on one of my colonies. My conchs have climbed up on the colony that has the gray stuff all over it a few times. Is that stuff basically conch-poop? I also have a large deposit of it beneath the edge of the other colony, almost like something dumped it out of a hole.I have found two tube worms(and I suspect I have more popping up) on that colony. Also, I've noticed an almost clear bulbous thing, shaped like an old fashioned hurricane lamp, and a small area of white stuff that looked like suds at first, but now it looks a bit harder, in the middle of the colony, between a few of the polyps. I did pick up one other hitchhiker with that rock, a small (1/4-1/2") chocolate chip starfish. Anyway, does it sound like I have issues, or is this normal?