I noticed about a week ago a small grayish black spot about the size of a dime with irregular edges on my sand.Fast foward to today and it`s the size of 2 50 cent pieces. What the heck could this be????? :help:
Hiya,
I'd like to know too....I have a piece about the same size on my LR. Thought it might be a new coral trying to grow, looks kinda like a irregular shaped bubble.
Meadbhb
:help:
