Oh ok, so it would be best to take it back I assume. I figured a few months in with no added fish, there would not be any problems. I read thy are a pretty tough animal compared to linkia's. I do test every week and haven't seen any spikes or anything, but I guess if even an unreadable parameter spike happens, that can do them in? My ph stays at 8.3, the salinity stays at 1.024, and the temp stays at 78. That's what I read was the biggest concern for sea stars other than the ammonia and things of that nature. I really would like to keep it, but if now is not the time then I will take it back.