Hello ! I purchased a blue S. Gigantea Carpet from my LFS on Saturday. I knew he was stressed when I bought him but I wanted to try to save him. He looks ok during the day, but I definately think he is bleached or partially bleached. He is fully open and good during the day but at night he shrivels up ( normal) and his mouth opens and some of his guts spew out over his mouth ( not Normal ). I have a 90 gallon corner tank that has been running for two and a half years. I have a 250 watt metal halide light and a high output T5 over the tank as well. My Nitrite is 0. My ph is 8.5 and my Nitrate is 10. My salinity is at 125. I really love carpets and really want to save this guy. I did a 30 gallon water change last night ( i do them every two weeks but did an extra one last night ) Any advise would be great. I have a large rose BTA in the tank on the opposite side that is absolutely thriving. I hope the carpet can recover and thrive too. Anyone know of anything I can do to help him recover ?