Reef Chemistry Puzzle #12

I think I am going to start the version of this but with fish/ coral. If there isn't one already.

Any ideas?

I'm not aware of one, but it seems like a fun idea for the main forum. :)
 

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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