Just like to let you all know why we need patience for this hobby. Started the tank for about 3 weeks. So far got a cleaner and thought since it is ok I should be able to buy fish. Everything tested quite ok so chiong to LFS last night after work. Walk to lavender. Cannot find Harlequin, walk down the road but Reborn closed. So thinking I won't be so suay walked futher and darn Paradiz Reef closed down. Not giving up I walk to Balestier, reached Sealife and happily bought a 2 spotted Goby. Came back office accustomised the fish and changed 20% of the tank water before releasing it into the tank. But... this morning come to office and found my dear friend laying on the tale dry like a ikan bilis. Just telling all noob out there like me, don't be impatient. Lesson learnt