Yes, i do still use it. Some experts believe that yeast can be harmful because it can cause frothing which hinder grease and other solids from settling. Homemade Rid-x Hunker Septic Tank Septic System Septic Cleaners You should not need any additives in a septic system. Does yeast work like rid x . Hasn't hurt anything where i've used it. Laundry soap / bleach, dish washer & hand soap residue all kill the little guys so i think adding is a good thing. Although yeast will help to break down certain starches, in the end, adding yeast is like dropping a pinch of salt into the ocean to try and make it a bit saltier. The only thing yeast does is convert sugar to carbon dioxide and alcohol. Even the kitchen sink has it's own drain. Too much of a good thing can be bad. By combining active yeast with warm water, sugar and cornmeal and flushing the mixture down just one of your toilets, you can help maintain a healthy bacterial level within your septic ta...