I have had a blue throat trigger for about 3 weeks. He has been eating krill shrimp like there is no tomorrow. 3 days ago he stopped eating. He has not touched a single krill, brine or mysis. can anyone give me a suggestion on what could be wrong? All of the other fish are eating well. I have 6 fish. the trigger, cardinal, yellow tang, psychadellic wrasse, mystery wrasse and a true perc. What can I do. my last water test was about a week ago and everything was perfect. nitrates 0 nitirtes 0 phos 0 cal 440 alk 9