I've had a tiny mini maxi for 6 weeks with no issues. Very bright green, never moved so seemed happy, then it disappeared. I can't find him anywhere. With how bright he is, I assumed he would be easy to find with the actinic lighting on full blast but still no sign of him. He was only about 1.5 inches. I've got so much live rock all cemented together so I can't take my tank apart to find him. How bad would it be if he has died? I know they can cause huge issues with the tank but I wasn't sure if his size and type would would create too much trouble. We have 150g, running carbon reactors and skimmer. Our water perameters are all good. Our tank is a year old and has been stable. Should I worry? He's been missing for a week.