The feng shui compass is used to determine your proper orientation when using the bagua energy map. In order to take an accurate reading for your feng shui work, you do not necessarily need a traditional feng shui compass, just an accurate magnetic one. If you decide to go deeper, owning a traditional feng shui compass can bring more complex insights to your work.
The most famous feng shui wealth fish is the arowana, or dragon fish, and the purest arowanas are known to command quite high fees. However, the koi, or gold fish, are just as effective, as well as a pleasure to look at. Go for 8 or 9 fish, one of them being black color. Aquariums are auspicious because they bring a harmonious combination of several wealth attracting feng shui factors. 
The ideal location of your bedroom is far from any doors that open to the outside world. Avoid bedrooms with sloping roofs. If you have to sleep underneath a sloping roof, you can use a canopy bed to weaken the effect. A canopy can also provide protection from other negative ceiling elements, like bright light fixtures, a bathroom on the floor directly above you, and a ceiling fan.
A grave at Puyang (around 4000 BC) that contains mosaics— actually a Chinese star map of the Dragon and Tiger asterisms and Beidou (the Big Dipper, Ladle or Bushel)— is oriented along a north–south axis.[6] The presence of both round and square shapes in the Puyang tomb, at Hongshan ceremonial centers and at the late Longshan settlement at Lutaigang,[7] suggests that gaitian cosmography (heaven-round, earth-square) existed in Chinese society long before it appeared in the Zhoubi Suanjing.[8]