Well sounds like you did things rite. We had a blue do the same thing, It just slowly over the corse of a month fell apart after being in our tank for awhile. Was acclimated the same way and all levels were where they needed to be and I know it wasn't starving cause I would target feed it just to make sure but I guess u win some and you loss some. It sucks cause there awesome starfish. The orange is supposed to be more hardy in an aquarium than the blue as well. That's about the extent of my knowledge with this one, maybe someone else can chime in if they know more. Sorry to hear about it.
