First I would like yo say that some of the members here are very knowledgable which is a good thing for me. My question or concern is that I have these white things on my rock that look almost like maggots but have like a little duster like at the end of it. there are about 2-3 mm now but i've seen them almost double that size earlier. Can anyone help in figuring out what these are. Thanks and loking forward to any answers.:frustrat::grumble: