white spots

tgditz

Reefing newb
I have white small hard spots that have started forming on my back wall of my cube and now the front, they are actually hard, do not appear to be alive, atleast not yet,lol. any ideas? there are lots of them, they are about the size of the tip of a pencil.
 
I don't think its anything to be concerned about, but the size sounds larger than the couple of ideas I have so a pic would be helpful! My guesses are that they are a cluster of spirorbid worms or snail eggs - both of which are good and signs that your tank is maturing. But both of those are smaller than a pencil eraser on their own.
 
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here are a couple pics of the white spots? no clue, they are hard, and hard to get off glass, can scratch off with finger nail, but magnet or scraper will not touch them!
 
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