The amount of bamboo stalks that are good for health are 7 lucky bamboo stalks.
For good health, in Feng Shui, you use 7 stalks of lucky bamboo, as the number 7 symbolizes good health and vitality.
However other numbers of lucky bamboo stalks like 3 lucky bamboo stalks, symbolize long life and happiness, 9 lucky bamboo stalks symbolize and relate to overall well being and 4 lucky bamboo stalks are avoided due to their association with death.
3 lucky bamboo stalks, means and symbolizes happiness, wealth, longevity, (Fu, Lu, Soh).
5 lucky bamboo stalks, mean and symbolize balance, peace, harmony and power.
7 lucky bamboo stalks, mean and symbolize good health.
8 lucky bamboo stalks, mean and symbolize growth, prosperity and wealth.
9 lucky bamboo stalks mean and symbolize great luck and the Pinnacle of Success.
10 lucky bamboo stalks mean and symbolize perfection and completeness.
And 21 lucky bamboo stalks mean and symbolize a powerful blessing.
And if your main focus is promoting good health, 7 stalks of lucky bamboo are recommended traditionally for inviting vitality and well being into your space.