55 gal 6 mo. old have a few fish,
shrimp lots of live rock calcium is low
ph is ok lots of calerpa -fan type and 2 other types 2 leather corals , lots of mushrooms and feather dusters - all life appears fine except 1 bunch of feather type calerpa which looks like it it turning white
I was watching the tank and all of the sudden critters starting coming out of a rock
at least 100 of them they look tiny badmitten
birdies and they pulse when they move
any ideas?????