I bought a kole tang and a small purple tang 8 days ago. They are in a 30 gallon quarantine tank. The purple has settled in nice eating flakes, mysis, and brine shrimp so far. Cannot get the kole tang to eat anything. Tried nori, algae wafers, frozen and flake food. Even tried a spurilina paste on the rocks nothing. He is in hiding anytime I approach the tank. Not much algae in this tank. Thinking of adding some live rock (has brown algae on it) from my DT , any thoughts or ideas please , thanks