OUR BEST FORMULA. Using RID-X for septic tanks regularly will help keep the bacteria population consistently high throughout the year. The natural bacteria and advanced enzymes start working immediately to break down paper, protein, oils & grease. Pre-measured, easy-to-use dissolvable gelpac pouches are safe for pipes and tanks. Always remember to use RID-X once a month along with regular pumping. One pouch of our powerful concentrated formula is 1 monthly dose for septic tanks between 700-1500 gallons. To use, just place a pouch in your toilet & flush. Based on national Nielsen sales data. Along with occasional pumping.