Keeping starfish in reef.

[Douglas]

Just looking for advice on successfully keeping star fish in reef tanks. My 72 gal reef has been running for about a year now. Starfish seem to only last a couple of months. They slowly loose limbs, gradually loose the tips, then die off. Is the tank too young? Do they need to be target fed? Should i test for anything out of the ordinary? The corals are thriving, and growing. But the Starfish seem to be a struggle. I have this issue with clams also. Any advice would help. Thanks