Rubber O Rings... Reef Safe?

Here's my dilemma, I drilled the holes in my rock a little too big for some of the frag plugs. I would like to keep it easy to pull the colonies for fragging so I don't want to epoxy them in.

So are standard black rubber O rings reef safe to put on the post of the plugs to make them more sturdy in the drilled holes? This could also help hold frag plugs on the racks so the snails don't knock them out...

Thanks!
Curtis

I would think that it depends on what the o rings were originally intended for.

Yes thay are fine

People use rubber bands for differant stuff so I would think it should be fine.

wash them first. Some have an oily film on them.