Be careful keeping it around peaceful SPS like Montis or Acros since they are incredibly agressive, grow blazingly fast, and have HUGE sweeper tentacles. That acro to the left is well within stinging range. They can have sweepers that are 6-8" at the size yours is now. Mine is slightly smaller and had to be put in a "canyon" because it had 5-6" long sweepers that have a very strong sting.