And need some advice, Some of my zoas and polys aren't opening up and I am on the verge of losing a few frags at this time. Everything had been going along fine for the last few months until the last few weeks. What I have been doing differant in the tank lately: I started trying to strech out my water changes, instead of a 20 to 25 gallon water change in my 125 gallon tank every seven days, I have streched it out to every 10 days and the only other thing I have done is, I have been feeding my fish a bit more food since I got another fish in the tank. The fish is a Kline Butterfly fish, I got him to help with an aiptasia problem in the tank, but I haven't seen him messing with the zoas and polys and I have been watching, lol. What I have done to try and correct this problem: I did a 20 gallon water change this past Sunday and I did a 25 gallon water change today ( four days later). Any thoughts?