my water parameters are great. No ammonia, phosphate, nitrite,nitrate. ph 8.2 salinity and temp are great. all other fish are fine. I have a sixline, percula, fire goby, none of which seem to really notice the new mandarin. the only change is that I added a calcium drip. but it's dripping 1x/4 seconds and the ph hasn't raised at all. it's been picking at the rock and eating the frozen brine which was surprising. He just all of a sudden went pale but seems to have some color coming back