They are very fast. In fact, they work on contact. When the bacteria revive they are hungry. As a result of eating and growing they start to multiply through cell division. Their number will double every 30 minutes under favorable conditions.
Complete instructions are inside each container.
Most septic systems in operation today are not functioning well. The tanks need pumping frequently because of solids build up. All too often the fields stop absorbing water prematurely. The number one reason is the vast array of household chemicals which either inhibit or kill biological action. The coliform bacteria normally present in sewage are in no way equal to present day demands.