My trigger fish is going up to the live rock, and quickly swimming sideways against the rock, as if to itch himself. He's the only one doing it. I'm curious if this is normal, or if this is an indication of something wrong in the tank. I finally have my salinity level to 1.024 where it should be, so I'm confused. Going to run through the rest of the tests to see how things are.

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10 gallon fresh setup with 1 giant danio, 3 placos, and 1 guppie.
30 gal bare bottom QT
55 gallon salt setup with a bunch of crabs and snails. false perc clown, diamond goby, lawnmower blenny, a green mandarin, and 1 cleaner shrimp. And a few corals
180 gallon acrylic not setup yet. (Need a few more things before it gets filled with water.)
Tanks not setup, 10, 30, 55 with stand. Either 30 or the 55 will be the sump for the 180

It is hard to tell from here but I am fairly sure your triggerfish has paracites as fish almost never scratch themselves against rock.
If he is breathing faster than normal Or shaking his head back and fourth, he definately has paracites and needs to be cured.
Paul

Thanks. We figured that out after doing some searching. Treating for ich right now, as I saw some spots on his fins.

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10 gallon fresh setup with 1 giant danio, 3 placos, and 1 guppie.
30 gal bare bottom QT
55 gallon salt setup with a bunch of crabs and snails. false perc clown, diamond goby, lawnmower blenny, a green mandarin, and 1 cleaner shrimp. And a few corals
180 gallon acrylic not setup yet. (Need a few more things before it gets filled with water.)
Tanks not setup, 10, 30, 55 with stand. Either 30 or the 55 will be the sump for the 180