Shelf life of Forget About It For Boats.
The living patented probiotic bacteria strains that make up the mother culture for Forget About It For Boats have been naturally occurring in the environment for thousands of years. In the bottle they are in a type of suspended state until they are activated when placed in a holding tank and begin to feed. Shelf life under normal room temperature is guaranteed to be two years. We have reports of the microbes living much longer.
Recap: 2 years