First reef tank 32 biocube

There is bubbles in the sand is this normal
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Yes
 
There’s a bunch of flat white spots on the glass what are these they don’t look alive
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Thank you @IOAOI the skimmer fits great in my 32 Biocube I will make a review once it breaks in
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IF YOU HAD TO TAKE A REEFING EXAM, WOULD YOU PASS?

  • Yes!

    Votes: 32 45.7%
  • Not yet, but I have one that I want to buy in mind!

    Votes: 9 12.9%
  • No.

    Votes: 26 37.1%
  • Other (please explain).

    Votes: 3 4.3%
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