Hi,
When this one catfish died. I had to remove it with my hand because the net would not reach. and that sucker did stick me good, But no ill effects. But it could be from it being passed away.
I now have two coral catfish in my tank, and some time ago I tried to add a one more of the same size. and it never seamed to school with the others. It lived for about 3mos a just died, of what I do not know. If you try to add more keep us posted to how things go.
If you want a cheep way to cure DIY liverock, Put it in the holding tank of your toilet and leave it there for about 3mo. Automatic water changes will happen naturally.