By the way, just curious if there is a necessary to do some water features or fountains in order to enhance my house FengShui?
Answer:
Not compulsory, unless for short turnovers of which you will need to pay back. It is very common to hear the XuanKong proponent in activating the annual or monthly Qi using water placement. Qi stimulating is a method for short term gain based mainly on the month's Qi. Coupled with the monthly "luck" in accordance to one's BaZi, everyone using that particular space would experience different effects. A good luck person would experience significant increase of opportunity in the expense of the bad luck person, if there are more then one person using that particular space. Otherwise, such increase in opportunity would means to hasten auspiciousness in the expense that when the person's luck make a dive, such dive would be doubled in effects. It all boils down to the "balance sheet" of one's BaZi.