The answer is NO, you do not need to add Cinderite annually.
Cinderite ONLY needs to be added to your soil one time and the benefits will last for many years to come.
The angular porous pieces of Cinderite hold and exchange nutrients efficiently and attract and redistribute energy back into the soil.
The only reason you would add in say 5 years is if you want better water retention, but the volcanic rock breaks down slowly over time, releasing trace minerals.