New Live Rock - Bleach or Maintain in quarantine?

[naesco]

I would not kill the live rock because that defeats the purpose of having live rock.
I would kill the aiptasia as earlier posted than add it to your tank and add a peppermint shrimp to devour any that you have missed.
Slowly acclimate the peppermint.
Bristtleworms are good guys. They eat detritous, excess food and their eggs and offspring provide food for you coral.