Why do you want to place a cup of water with black stones in the NW sector of your bedroom? For activation, remedy or because you saw somebody doing that.
Feng Shui is about harmonizing the energy in our environment. We should not over do anything. If you still insist to activate, you should refer to date selection techniques too.
In the bedroom, should not place water element. it is not good. Water like a sun when you put it in your room.
You can put stone in there. beacause 8 star is that all this year.
