Boveda is the only product in the world that "knows" when to stop adding moisture and won’t humidify beyond the RH on the pack. When the RH in the container reaches the number on the pack, the Boveda will maintain the humidity until the conditions change again. There is no such thing as “too much” Boveda, as using a larger Boveda than needed for the amount of cannabis being stored will simply work more efficiently and last longer. Just make sure you're using the RH levels recommended for cannabis storage: 58% or 62%.