okay, so i did another water parameters check today and everything was normal. mag = 1300 cal = 500 dkh = 10 phos = 0 nitrate = 0 nitrite = 0 ammonia = 0 ph = 8.3 temp =80.5 salinity =1.026 each and every coral in the tank is okay except the elegance and BEHOLD what i noticed while i was testing my water. my silly maroon clown (gold band) was picking on the elegance. flipping it's tail and nipping on it from time to time. i started a thread before about my clowns unusual behavior like flipping it's tail and creating a burrow. someone replied that it might be establishing a territory. and the elegance was at its territory. i just moved the elegance and hopefully it will recover but it is slimming a little at its mouth. and as for the sally lightfoot? i believe that they do die for no reason at all. i guess i finally solved the mystery of my elegance.