Thanks Anthony - good thought and I already have an eggcrate cage built although once the Angel is in the tank I don't think he will go willingly into the cage. I actually have the clams coming up at the same time as the Angel so they will go into the tank together. If he does start munching on them they will either come out and go into my other tank or
I may just build a couple of small egg crate cages to go around the clams!