cleaning animals that won't get eaten?

[Rudiger]

I tried to ask this in a different forum but no one knew what an octo would or would not eat. Can I get any animals that will clean the gravel in my tank that won't get eaten by the octo?

When I bought the octopus I was also sent 25 hermit crabs and two pencil urchins for free. Hermit crabs obviously disappeared in a week, but the pencil urchins have stuck around. They usually hang out on the rocks or glass though, so gravel goes uncleaned (except in water changes)

pat

 

[cephalopoder]

Pat
Starfish, sea cucumbers are ok. Snails may be ok depending on the octo.
I have one sand sifting cucumber. It is the same cucumber that has been with me since I started in salt water. I have used him in every tank I have. I usually keep him on one tank for a month or so then pick him up and drop him in another. The litte guy is a great sand cleaner. His name is Mr. Hanky I think you can figure out what he loos like

 

[Rudiger]

I think i can. Does he also match Mr. Hanky's color? He is a sand shifter, but would he do the same thing to gravel?