The spinal fluid procedure is for people with disc degeneration, I'm not sure if there is a noticeable height boost or even if the spinal fluid injected is permanent. There is also artificial discs, but I don't know if they add any height.
All in all, there is no effective method yet and we have to wait for the future. I'm confident stem cell research will lead to a method to incease people's height some day in the future, but we might have to wait 50 or 100 years.