I've had a melanarus wrasse in QT (20 gal cycled with LR and sand) for about 3 weeks. He has been doing great. Eating well, etc. Usually out of the sand when I get up at 5:30 am, until yestetday he wasn't out. He is still in hiding today, or he is coming out when no one is home to see him. Tank params are fine, 0 ammonia or nitrites, nitrate 5-10, pH 7.8, temp 78. Anyone ever experience this? When should I get concerned? We did check the floor and HOB filter, no jumper found. His only tankmates are a couple of small hermits.