OK. This is how Aquarius by the park looks like. The bus stop, which can be checked at http://www.sbstransit.com.sg/, can be found there. Just click for IRIS journey planner, type in bus stop name or something like that as 'opp The Clearwater Condo' or 'The Clearwater Condo'. I can tell you that when you see a stupid building with a blue roof, press the 'stop button' located on your bus. When you walk in, try to look resident-ish so the hardworking guards will not question you. Most likely I will be there to welcome you (and collect entrance fees).
Bus services: 5(simei), 18(bedok), 21, 22, 59(bishan, changi village) , 65, 67(tampines, choa chu kang), 87 (from sengkang), 168(woodlands).