If you have a crowd coming over, that is definitely the time to add beneficial bacteria to your septic. Extra people are an extra load. EcoEthic Septic Treatment contains all the necessary strains of digestive microbes to break down all the components of waste including, paper fibre, soap scum & grease. Proper septic function in the tank results in a longer life of your overall system. If you have a particularly large crowd, consider the rental of a portable toilet to take the burden off your septic system.