RID-X® 1920089448 Professional Powder Septic Tank System Treatment, 39.2 OzUse the powerful RID X Powder formula for septic tank care and to save yourself from a disgusting septic disaster. Helps maintain a healthy balance of septic bacteria throughout the year in order to prevent expensive septic backups. Natural and safe for pipes and septic systems. Always remember to use RID X once per month along with regular pumping. Size: 39. 2 Oz (4 monthly doses for tanks up to 1500 gallons) Simply pour powder down the toilet and