I have a problem with my medium sized frog spawn it has pulled all the way back in to its base for the last 3 days.I am scratching my head to what has caused this.All my levels not changed calcium 440, alk 3.5 meq/l,nitrite 0,ammonia 0, phosphates 0,sal 1.025,and pH 8.2...My nitrates are little high 25 or so but that is norm for my tank.I am hoping it has not died on me.any ideas or what i can attempt to get it to open up.The only thing new in my tank is a protein skimmer,but I know that is not the problem. :