I bought 2 heads of duncans, and do feed them mysis regularly and they are growing like crazy. they are the same ones that digitydash has. I have noticed however that on mine the tenticles are starting to turn slightly brown, wonder if they are getting to much light. we have ALOT of light in our tank, and I had them say 2/3 to 3/4 of the way up the rockwork. So that might be a consideration when placing them, we moved them last night off to the side on some of the bottom rocks of the tank. I do have to say out of the few frags we have in our aquarium I love the duncans the most!