I got mine from Alamo and its about an inch in size. It opens up for about 10mins and then goes back in. Ive looked at it at night to see if there is a change but nothing. I have never seen it open all the way since ive had it. I got it on Saturday and the rest of my corals are doing fine. Whats going on with the Frogspawn? Could it be stressed out? Any help would be great. Ive always wanted one and now I do and its acting funny. :cry